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Build Information

Failed to build Futures with Swift 5.10 for Linux.

Build Command

bash -c docker run --rm -v "checkouts-4606859-0":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-5.10-latest swift build 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.29.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/dfunckt/swift-futures.git
Reference: master
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/dfunckt/swift-futures
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 518a3fd Update for swiftformat 0.47.2
Cloned https://github.com/dfunckt/swift-futures.git
Revision (git rev-parse @):
518a3fddab9feb068391e10302d44181e3653979
SUCCESS checkout https://github.com/dfunckt/swift-futures.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             5.10
Building package at path:  $workDir
https://github.com/dfunckt/swift-futures.git
Running build ...
bash -c docker run --rm -v "checkouts-4606859-0":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-5.10-latest swift build 2>&1
Building for debugging...
[0/5] Write sources
[3/5] Compiling FuturesPrivate Private.c
[4/5] Write swift-version-24593BA9C3E375BF.txt
[6/27] Emitting module FuturesSync
[7/30] Compiling FuturesSync Atomic.swift
[8/30] Compiling FuturesSync AtomicBitset.swift
[9/30] Compiling FuturesSync AtomicEnum.swift
[10/30] Compiling FuturesSync AtomicPointer.swift
[11/30] Compiling FuturesSync AtomicReference.swift
[12/30] Compiling FuturesSync AtomicValue.swift
[13/30] Compiling FuturesSync Mutex.swift
[14/30] Compiling FuturesSync Private.swift
[15/30] Compiling FuturesSync Thread.swift
[16/30] Compiling FuturesSync PosixLock.swift
[17/30] Compiling FuturesSync SpinLock.swift
[18/30] Compiling FuturesSync UnfairLock.swift
[19/30] Compiling FuturesSync AtomicMPMCQueue.swift
[20/30] Compiling FuturesSync AtomicMPSCQueue.swift
[21/30] Compiling FuturesSync AtomicSPMCQueue.swift
[22/30] Compiling FuturesSync AtomicQueue.swift
[23/30] Compiling FuturesSync AtomicBuffer.swift
[24/30] Compiling FuturesSync AtomicList.swift
[25/30] Compiling FuturesSync AtomicSPSCQueue.swift
[26/30] Compiling FuturesSync AtomicUnboundedMPSCQueue.swift
[27/30] Compiling FuturesSync AtomicUnboundedSPSCQueue.swift
[28/30] Compiling FuturesSync Backoff.swift
[29/30] Compiling FuturesSync Locking.swift
[30/30] Compiling FuturesSync PosixConditionLock.swift
[32/158] Compiling Futures Future.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[33/158] Compiling Futures AbortFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[34/158] Compiling Futures AssertNoErrorFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[35/158] Compiling Futures BreakpointFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[36/158] Compiling Futures CatchErrorFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[37/158] Compiling Futures FlatMapFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[38/158] Compiling Futures FlattenFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[39/158] Compiling Futures FlattenResultFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[40/158] Compiling Futures FutureStream.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[41/158] Compiling Futures HandleEventsFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[42/158] Compiling Futures IgnoreOutputFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[43/158] Compiling Futures JoinAllFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[44/158] Compiling Futures JoinFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[45/158] Compiling Futures LazyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[46/158] Compiling Futures MapFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[47/158] Compiling Futures MapKeyPathFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[48/158] Compiling Futures MapResultFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[49/158] Compiling Futures MatchEitherFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[50/176] Compiling Futures FlattenStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[51/176] Compiling Futures ForEachStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[52/176] Compiling Futures GenerateStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[53/176] Compiling Futures HandleEventsStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[54/176] Compiling Futures JoinStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[55/176] Compiling Futures JustStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[56/176] Compiling Futures LatestStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[57/176] Compiling Futures LazyStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[58/176] Compiling Futures MapKeyPathStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[59/176] Compiling Futures MapResultStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[60/176] Compiling Futures MapStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[61/176] Compiling Futures MatchEitherStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[62/176] Compiling Futures MatchOptionalStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[63/176] Compiling Futures MatchResultStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[64/176] Compiling Futures MergeAllStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[65/176] Compiling Futures MergeStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[66/176] Compiling Futures MulticastStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[67/176] Compiling Futures NeverStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
error: emit-module command failed with exit code 1 (use -v to see invocation)
[68/176] Emitting module Futures
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[69/176] Compiling Futures MatchOptionalFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[70/176] Compiling Futures MatchResultFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[71/176] Compiling Futures NeverFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[72/176] Compiling Futures PeekFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[73/176] Compiling Futures PollOnFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[74/176] Compiling Futures PrintFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[75/176] Compiling Futures ReadyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[76/176] Compiling Futures ReferenceFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[77/176] Compiling Futures ReplaceErrorFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[78/176] Compiling Futures ReplaceOutputFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[79/176] Compiling Futures SelectAnyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[80/176] Compiling Futures SelectFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[81/176] Compiling Futures SetFailureTypeFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[82/176] Compiling Futures ThenFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[83/176] Compiling Futures TryLazyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[84/176] Compiling Futures TryMapFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[85/176] Compiling Futures AdaptiveQueue.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[86/176] Compiling Futures CircularBuffer.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[87/176] Compiling Futures OptionalStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[88/176] Compiling Futures OutputStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[89/176] Compiling Futures PollOnStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[90/176] Compiling Futures PrefixStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[91/176] Compiling Futures PrefixUntilOutputStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[92/176] Compiling Futures PrefixWhileStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[93/176] Compiling Futures PrintStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[94/176] Compiling Futures ReferenceStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[95/176] Compiling Futures RemoveDuplicatesStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[96/176] Compiling Futures RepeatStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[97/176] Compiling Futures ReplaceEmptyStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[98/176] Compiling Futures ReplaceErrorStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[99/176] Compiling Futures ScanStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[100/176] Compiling Futures SequenceStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[101/176] Compiling Futures SetFailureTypeStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[102/176] Compiling Futures ShareStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[103/176] Compiling Futures StreamAllSatisfyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[104/176] Compiling Futures StreamContainsFuture.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[105/176] Compiling Futures SinkSendFuture.swift
[106/176] Compiling Futures Stream.swift
[107/176] Compiling Futures AbortStream.swift
[108/176] Compiling Futures AssertNoErrorStream.swift
[109/176] Compiling Futures BreakpointStream.swift
[110/176] Compiling Futures BufferStream.swift
[111/176] Compiling Futures CatchErrorStream.swift
[112/176] Compiling Futures CompactMapStream.swift
[113/176] Compiling Futures CompleteOnErrorStream.swift
[114/176] Compiling Futures ConcatenateStream.swift
[115/176] Compiling Futures DropStream.swift
[116/176] Compiling Futures DropUntilOutputStream.swift
[117/176] Compiling Futures DropWhileStream.swift
[118/176] Compiling Futures EmptyStream.swift
[119/176] Compiling Futures EnumerateStream.swift
[120/176] Compiling Futures FilterStream.swift
[121/176] Compiling Futures FlatMapStream.swift
[122/176] Compiling Futures FlattenResultStream.swift
[123/176] Compiling Futures Cancellable.swift
[124/176] Compiling Futures Channel.swift
[125/176] Compiling Futures ChannelImpl.swift
[126/176] Compiling Futures ChannelMPSCBufferBounded.swift
[127/176] Compiling Futures ChannelMPSCBufferUnbounded.swift
[128/176] Compiling Futures ChannelMPSCPark.swift
[129/176] Compiling Futures ChannelSPSCBufferBounded.swift
[130/176] Compiling Futures ChannelSPSCBufferUnbounded.swift
[131/176] Compiling Futures ChannelSPSCPark.swift
[132/176] Compiling Futures ChannelSlotBounded.swift
[133/176] Compiling Futures ChannelSlotUnbounded.swift
[134/176] Compiling Futures Context.swift
[135/176] Compiling Futures Either.swift
[136/176] Compiling Futures Executor.swift
[137/176] Compiling Futures QueueExecutor.swift
[138/176] Compiling Futures RunLoopExecutor.swift
[139/176] Compiling Futures ThreadExecutor.swift
[140/176] Compiling Futures Extensions.swift
[141/176] Compiling Futures Private.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[142/176] Compiling Futures TaskRunner.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[143/176] Compiling Futures TaskScheduler.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[144/176] Compiling Futures Poll.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[145/176] Compiling Futures Promise.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[146/176] Compiling Futures Result.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[147/176] Compiling Futures Sink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[148/176] Compiling Futures AssertNoErrorSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[149/176] Compiling Futures BlockingSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[150/176] Compiling Futures BufferSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[151/176] Compiling Futures CollectSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[152/176] Compiling Futures FlatMapInputSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[153/176] Compiling Futures MapErrorSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[154/176] Compiling Futures MapInputSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[155/176] Compiling Futures SetFailureTypeSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[156/176] Compiling Futures SinkCloseFuture.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[157/176] Compiling Futures SinkFlushFuture.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[158/176] Compiling Futures SinkSendAllFuture.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[159/176] Compiling Futures StreamContainsWhereFuture.swift
[160/176] Compiling Futures StreamFirstFuture.swift
[161/176] Compiling Futures StreamFirstWhereFuture.swift
[162/176] Compiling Futures StreamForwardFuture.swift
[163/176] Compiling Futures StreamFuture.swift
[164/176] Compiling Futures StreamIgnoreOutputFuture.swift
[165/176] Compiling Futures StreamLastFuture.swift
[166/176] Compiling Futures StreamLastWhereFuture.swift
[167/176] Compiling Futures StreamReduceFuture.swift
[168/176] Compiling Futures StreamReduceIntoFuture.swift
[169/176] Compiling Futures StreamReplayBuffer.swift
[170/176] Compiling Futures SwitchToLatestStream.swift
[171/176] Compiling Futures TryMapStream.swift
[172/176] Compiling Futures UnfoldStream.swift
[173/176] Compiling Futures YieldStream.swift
[174/176] Compiling Futures ZipStream.swift
[175/176] Compiling Futures Task.swift
[176/176] Compiling Futures Waker.swift
error: fatalError
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/34] Compiling Futures FlatMapFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[3/34] Compiling Futures FlattenFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[4/34] Compiling Futures FlattenResultFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[5/34] Compiling Futures FutureStream.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[6/34] Compiling Futures HandleEventsFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[7/38] Compiling Futures MapStream.swift
[8/38] Compiling Futures MatchEitherStream.swift
[9/38] Compiling Futures MatchOptionalStream.swift
[10/38] Compiling Futures MatchResultStream.swift
[11/45] Compiling Futures LatestStream.swift
[12/45] Compiling Futures LazyStream.swift
[13/45] Compiling Futures MapKeyPathStream.swift
[14/45] Compiling Futures MapResultStream.swift
[15/52] Compiling Futures CatchErrorStream.swift
[16/52] Compiling Futures CompactMapStream.swift
[17/52] Compiling Futures CompleteOnErrorStream.swift
[18/52] Compiling Futures ConcatenateStream.swift
[19/52] Compiling Futures DropStream.swift
[20/52] Compiling Futures DropUntilOutputStream.swift
[21/52] Compiling Futures DropWhileStream.swift
[22/59] Compiling Futures Future.swift
[23/59] Compiling Futures AbortFuture.swift
[24/59] Compiling Futures AssertNoErrorFuture.swift
[25/59] Compiling Futures BreakpointFuture.swift
[26/59] Compiling Futures CatchErrorFuture.swift
[27/66] Compiling Futures EmptyStream.swift
[28/66] Compiling Futures EnumerateStream.swift
[29/66] Compiling Futures FilterStream.swift
[30/66] Compiling Futures FlatMapStream.swift
[31/66] Compiling Futures FlattenResultStream.swift
[32/66] Compiling Futures OptionalStream.swift
[33/66] Compiling Futures OutputStream.swift
[34/73] Compiling Futures PollOnStream.swift
[35/73] Compiling Futures PrefixStream.swift
[36/73] Compiling Futures PrefixUntilOutputStream.swift
[37/73] Compiling Futures PrefixWhileStream.swift
[38/73] Compiling Futures PrintStream.swift
[39/73] Compiling Futures ReferenceStream.swift
[40/73] Compiling Futures RemoveDuplicatesStream.swift
[41/79] Compiling Futures MergeAllStream.swift
[42/79] Compiling Futures MergeStream.swift
[43/79] Compiling Futures MulticastStream.swift
[44/79] Compiling Futures NeverStream.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[45/85] Emitting module Futures
/host/spi-builder-workspace/Sources/Futures/Future/FlattenFuture.swift:17:20: error: cannot convert value of type 'Base.Output.FutureType' to closure result type 'Base.Output'
                $0.makeFuture()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[46/85] Compiling Futures MapKeyPathFuture.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[47/85] Compiling Futures MapResultFuture.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[48/85] Compiling Futures MatchEitherFuture.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[49/85] Compiling Futures FlattenStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[50/85] Compiling Futures ForEachStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/FlattenStream.swift:17:20: error: cannot convert value of type 'Base.Output.StreamType' to closure result type 'Base.Output'
                $0.makeStream()
                ~~~^~~~~~~~~~~~
                                as! Base.Output
[51/96] Compiling Futures StreamAllSatisfyFuture.swift
[52/96] Compiling Futures StreamContainsFuture.swift
[53/96] Compiling Futures StreamContainsWhereFuture.swift
[54/96] Compiling Futures StreamFirstFuture.swift
[55/96] Compiling Futures StreamFirstWhereFuture.swift
[56/96] Compiling Futures StreamForwardFuture.swift
[57/101] Compiling Futures Executor.swift
[58/101] Compiling Futures Extensions.swift
[59/101] Compiling Futures Stream.swift
[60/101] Compiling Futures AbortStream.swift
[61/101] Compiling Futures AssertNoErrorStream.swift
[62/101] Compiling Futures BreakpointStream.swift
[63/101] Compiling Futures BufferStream.swift
[64/106] Compiling Futures RepeatStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[65/106] Compiling Futures ReplaceEmptyStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[66/106] Compiling Futures ReplaceErrorStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[67/106] Compiling Futures ScanStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[68/106] Compiling Futures SequenceStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[69/106] Compiling Futures SetFailureTypeStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[70/106] Compiling Futures ShareStream.swift
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Stream/SetFailureTypeStream.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[71/111] Compiling Futures StreamFuture.swift
[72/111] Compiling Futures StreamIgnoreOutputFuture.swift
[73/111] Compiling Futures StreamLastFuture.swift
[74/111] Compiling Futures StreamLastWhereFuture.swift
[75/111] Compiling Futures StreamReduceFuture.swift
[76/111] Compiling Futures StreamReduceIntoFuture.swift
[77/116] Compiling Futures PollOnFuture.swift
[78/116] Compiling Futures PrintFuture.swift
[79/116] Compiling Futures ReadyFuture.swift
[80/116] Compiling Futures ReferenceFuture.swift
[81/116] Compiling Futures ReplaceErrorFuture.swift
[82/121] Compiling Futures ThreadExecutor.swift
[83/121] Compiling Futures MatchOptionalFuture.swift
[84/121] Compiling Futures MatchResultFuture.swift
[85/121] Compiling Futures NeverFuture.swift
[86/121] Compiling Futures PeekFuture.swift
[87/126] Compiling Futures ReplaceOutputFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[88/126] Compiling Futures SelectAnyFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[89/126] Compiling Futures SelectFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[90/126] Compiling Futures SetFailureTypeFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[91/126] Compiling Futures ThenFuture.swift
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:27: warning: will never be executed
            $0.mapError { $0 as! Failure }
                          ^
/host/spi-builder-workspace/Sources/Futures/Future/SetFailureTypeFuture.swift:35:25: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
            $0.mapError { $0 as! Failure }
                        ^
[92/131] Compiling Futures IgnoreOutputFuture.swift
[93/131] Compiling Futures JoinAllFuture.swift
[94/131] Compiling Futures JoinFuture.swift
[95/131] Compiling Futures LazyFuture.swift
[96/131] Compiling Futures MapFuture.swift
[97/131] Compiling Futures GenerateStream.swift
[98/131] Compiling Futures HandleEventsStream.swift
[99/131] Compiling Futures JoinStream.swift
[100/131] Compiling Futures JustStream.swift
[101/131] Compiling Futures StreamReplayBuffer.swift
[102/131] Compiling Futures SwitchToLatestStream.swift
[103/131] Compiling Futures TryMapStream.swift
[104/131] Compiling Futures UnfoldStream.swift
[105/131] Compiling Futures YieldStream.swift
[106/131] Compiling Futures ZipStream.swift
[107/131] Compiling Futures CollectSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[108/131] Compiling Futures FlatMapInputSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[109/131] Compiling Futures MapErrorSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[110/131] Compiling Futures MapInputSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[111/131] Compiling Futures SetFailureTypeSink.swift
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:25:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:24:56: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollSend(&context, item).mapError {
                                                       ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:32:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:31:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollFlush(&context).mapError {
                                                  ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:39:13: warning: will never be executed
            .failure(.failure($0 as! Failure)) // swiftlint:disable:this force_cast
            ^
/host/spi-builder-workspace/Sources/Futures/Sink/SetFailureTypeSink.swift:38:51: note: '$0' is of type 'Never' which cannot be constructed because it is an enum with no cases
        return _base.pollClose(&context).mapError {
                                                  ^
[112/131] Compiling Futures TryLazyFuture.swift
[113/131] Compiling Futures TryMapFuture.swift
[114/131] Compiling Futures Private.swift
[115/131] Compiling Futures TaskRunner.swift
[116/131] Compiling Futures TaskScheduler.swift
[117/131] Compiling Futures ChannelImpl.swift
[118/131] Compiling Futures Context.swift
[119/131] Compiling Futures Either.swift
[120/131] Compiling Futures QueueExecutor.swift
[121/131] Compiling Futures RunLoopExecutor.swift
[122/131] Compiling Futures SinkCloseFuture.swift
[123/131] Compiling Futures SinkFlushFuture.swift
[124/131] Compiling Futures SinkSendAllFuture.swift
[125/131] Compiling Futures SinkSendFuture.swift
[126/131] Compiling Futures Task.swift
[127/131] Compiling Futures Promise.swift
[128/131] Compiling Futures Result.swift
[129/131] Compiling Futures Sink.swift
[130/131] Compiling Futures BlockingSink.swift
[131/131] Compiling Futures BufferSink.swift
error: fatalError
BUILD FAILURE 5.10 linux

Build Machine: Linux 1