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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build Templator with Swift 5.10 for Linux.

Build Command

bash -c docker run --rm -v "checkouts-4609320-1":/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/einstore/templator.git
Reference: 0.0.1
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/einstore/templator
 * tag               0.0.1      -> FETCH_HEAD
HEAD is now at 7d87133 readme & small tweaking
Cloned https://github.com/einstore/templator.git
Revision (git rev-parse @):
7d87133e4c52d20ab025f2d5c44ffc3a2d0998e1
SUCCESS checkout https://github.com/einstore/templator.git at 0.0.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             5.10
Building package at path:  $workDir
https://github.com/einstore/templator.git
Running build ...
bash -c docker run --rm -v "checkouts-4609320-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-5.10-latest swift build 2>&1
Fetching https://github.com/vapor/crypto.git
Fetching https://github.com/vapor/service.git
Fetching https://github.com/apple/swift-nio-zlib-support.git
Fetching https://github.com/vapor/sql.git
Fetching https://github.com/apple/swift-nio-ssl.git
Fetching https://github.com/vapor/core.git
[1/919] Fetching service
[920/3705] Fetching service, crypto
[1088/3720] Fetching service, crypto, swift-nio-zlib-support
[2301/8685] Fetching service, crypto, swift-nio-zlib-support, sql
[5161/28828] Fetching service, crypto, swift-nio-zlib-support, sql, core
[24801/40975] Fetching service, crypto, swift-nio-zlib-support, sql, core, swift-nio-ssl
Fetched https://github.com/vapor/service.git from cache (1.00s)
Fetching https://github.com/vapor/console.git
[1/5278] Fetching console
Fetched https://github.com/vapor/console.git from cache (0.41s)
Fetching https://github.com/vapor/database-kit.git
Fetched https://github.com/apple/swift-nio-zlib-support.git from cache (1.55s)
Fetching https://github.com/apple/swift-nio-ssl-support.git
Fetched https://github.com/vapor/crypto.git from cache (1.56s)
Fetching https://github.com/vapor/url-encoded-form.git
Fetched https://github.com/vapor/sql.git from cache (1.56s)
Fetching https://github.com/vapor/validation.git
Fetched https://github.com/apple/swift-nio-ssl.git from cache (1.57s)
Fetching https://github.com/vapor/websocket.git
Fetched https://github.com/vapor/core.git from cache (1.58s)
Fetching https://github.com/vapor/vapor.git
[1/1181] Fetching database-kit
Fetched https://github.com/vapor/database-kit.git from cache (0.31s)
Fetching https://github.com/apple/swift-nio.git
[1/381] Fetching url-encoded-form
[120/960] Fetching url-encoded-form, validation
[545/976] Fetching url-encoded-form, validation, swift-nio-ssl-support
[977/3387] Fetching url-encoded-form, validation, swift-nio-ssl-support, websocket
Fetched https://github.com/vapor/url-encoded-form.git from cache (0.29s)
Fetching https://github.com/vapor/fluent.git
Fetched https://github.com/apple/swift-nio-ssl-support.git from cache (0.30s)
Fetching https://github.com/vapor/routing.git
Fetched https://github.com/vapor/validation.git from cache (0.29s)
Fetching https://github.com/vapor/template-kit.git
Fetched https://github.com/vapor/websocket.git from cache (0.35s)
Fetching https://github.com/vapor/leaf.git
[1/1282] Fetching template-kit
[232/68560] Fetching template-kit, vapor
[1284/89228] Fetching template-kit, vapor, routing
[1285/102533] Fetching template-kit, vapor, routing, fluent
[3509/106417] Fetching template-kit, vapor, routing, fluent, leaf
Fetched https://github.com/vapor/template-kit.git from cache (0.32s)
Fetching https://github.com/vapor/http.git
[15602/105135] Fetching vapor, routing, fluent, leaf
Fetched https://github.com/vapor/leaf.git from cache (0.38s)
[31329/101251] Fetching vapor, routing, fluent
Fetching https://github.com/vapor/multipart.git
[40142/126718] Fetching vapor, routing, fluent, http
[48693/191193] Fetching vapor, routing, fluent, http, swift-nio
[49458/192893] Fetching vapor, routing, fluent, http, swift-nio, multipart
Fetched https://github.com/vapor/fluent.git from cache (1.27s)
[107573/179588] Fetching vapor, routing, http, swift-nio, multipart
Fetched https://github.com/vapor/routing.git from cache (1.29s)
[87159/158920] Fetching vapor, http, swift-nio, multipart
Fetched https://github.com/vapor/http.git from cache (1.68s)
[86487/133453] Fetching vapor, swift-nio, multipart
Fetched https://github.com/vapor/vapor.git from cache (3.05s)
Computing version for https://github.com/vapor/fluent.git
[28780/66175] Fetching swift-nio, multipart
Fetched https://github.com/vapor/multipart.git from cache (2.60s)
[31593/64475] Fetching swift-nio
Computed https://github.com/vapor/fluent.git at 3.2.0 (2.67s)
Computing version for https://github.com/vapor/leaf.git
Fetched https://github.com/apple/swift-nio.git from cache (7.19s)
Computed https://github.com/vapor/leaf.git at 3.0.2 (1.64s)
Computing version for https://github.com/vapor/vapor.git
Computed https://github.com/vapor/vapor.git at 3.3.0 (0.55s)
Computing version for https://github.com/vapor/sql.git
Computed https://github.com/vapor/sql.git at 2.3.2 (0.46s)
Computing version for https://github.com/vapor/service.git
Computed https://github.com/vapor/service.git at 1.0.2 (0.48s)
Computing version for https://github.com/vapor/database-kit.git
Computed https://github.com/vapor/database-kit.git at 1.3.3 (0.54s)
Computing version for https://github.com/vapor/console.git
Computed https://github.com/vapor/console.git at 3.1.1 (0.54s)
Computing version for https://github.com/vapor/core.git
Computed https://github.com/vapor/core.git at 3.8.1 (0.79s)
Computing version for https://github.com/vapor/template-kit.git
Computed https://github.com/vapor/template-kit.git at 1.1.2 (0.46s)
Computing version for https://github.com/vapor/websocket.git
Computed https://github.com/vapor/websocket.git at 1.1.2 (0.67s)
Computing version for https://github.com/vapor/validation.git
Computed https://github.com/vapor/validation.git at 2.1.1 (0.46s)
Computing version for https://github.com/vapor/url-encoded-form.git
Computed https://github.com/vapor/url-encoded-form.git at 1.0.6 (0.44s)
Computing version for https://github.com/vapor/routing.git
Computed https://github.com/vapor/routing.git at 3.0.2 (0.47s)
Computing version for https://github.com/vapor/multipart.git
Computed https://github.com/vapor/multipart.git at 3.0.4 (0.46s)
Computing version for https://github.com/vapor/http.git
Computed https://github.com/vapor/http.git at 3.2.0 (0.45s)
Computing version for https://github.com/vapor/crypto.git
Computed https://github.com/vapor/crypto.git at 3.3.2 (0.46s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 1.14.1 (0.52s)
Computing version for https://github.com/apple/swift-nio-ssl.git
Computed https://github.com/apple/swift-nio-ssl.git at 1.4.0 (0.46s)
Computing version for https://github.com/apple/swift-nio-ssl-support.git
Computed https://github.com/apple/swift-nio-ssl-support.git at 1.0.0 (0.44s)
Computing version for https://github.com/apple/swift-nio-zlib-support.git
Computed https://github.com/apple/swift-nio-zlib-support.git at 1.0.0 (0.43s)
Creating working copy for https://github.com/vapor/database-kit.git
Working copy of https://github.com/vapor/database-kit.git resolved at 1.3.3
Creating working copy for https://github.com/vapor/sql.git
Working copy of https://github.com/vapor/sql.git resolved at 2.3.2
Creating working copy for https://github.com/vapor/vapor.git
Working copy of https://github.com/vapor/vapor.git resolved at 3.3.0
Creating working copy for https://github.com/apple/swift-nio-zlib-support.git
Working copy of https://github.com/apple/swift-nio-zlib-support.git resolved at 1.0.0
Creating working copy for https://github.com/vapor/url-encoded-form.git
Working copy of https://github.com/vapor/url-encoded-form.git resolved at 1.0.6
Creating working copy for https://github.com/vapor/service.git
Working copy of https://github.com/vapor/service.git resolved at 1.0.2
Creating working copy for https://github.com/vapor/console.git
Working copy of https://github.com/vapor/console.git resolved at 3.1.1
Creating working copy for https://github.com/vapor/routing.git
Working copy of https://github.com/vapor/routing.git resolved at 3.0.2
Creating working copy for https://github.com/vapor/websocket.git
Working copy of https://github.com/vapor/websocket.git resolved at 1.1.2
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 1.14.1
Creating working copy for https://github.com/apple/swift-nio-ssl.git
Working copy of https://github.com/apple/swift-nio-ssl.git resolved at 1.4.0
Creating working copy for https://github.com/vapor/template-kit.git
Working copy of https://github.com/vapor/template-kit.git resolved at 1.1.2
Creating working copy for https://github.com/apple/swift-nio-ssl-support.git
Working copy of https://github.com/apple/swift-nio-ssl-support.git resolved at 1.0.0
Creating working copy for https://github.com/vapor/fluent.git
Working copy of https://github.com/vapor/fluent.git resolved at 3.2.0
Creating working copy for https://github.com/vapor/multipart.git
Working copy of https://github.com/vapor/multipart.git resolved at 3.0.4
Creating working copy for https://github.com/vapor/core.git
Working copy of https://github.com/vapor/core.git resolved at 3.8.1
Creating working copy for https://github.com/vapor/leaf.git
Working copy of https://github.com/vapor/leaf.git resolved at 3.0.2
Creating working copy for https://github.com/vapor/crypto.git
Working copy of https://github.com/vapor/crypto.git resolved at 3.3.2
Creating working copy for https://github.com/vapor/http.git
Working copy of https://github.com/vapor/http.git resolved at 3.2.0
Creating working copy for https://github.com/vapor/validation.git
Working copy of https://github.com/vapor/validation.git resolved at 2.1.1
warning: 'swift-nio-ssl-support': ignoring declared target(s) 'swift-nio-ssl-support' in the system package
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
Building for debugging...
[0/45] Write sources
[30/45] Compiling CNIOZlib empty.c
[31/45] Compiling CNIOLinux ifaddrs-android.c
[32/45] Compiling CNIOSHA1 c_nio_sha1.c
[33/45] Compiling CNIOLinux shim.c
[34/45] Compiling CNIODarwin shim.c
[35/45] Compiling CBcrypt bcrypt.c
[36/45] Compiling CBcrypt blf.c
[37/45] Write sources
[38/45] Write swift-version-24593BA9C3E375BF.txt
[39/45] Compiling CNIOHTTPParser c_nio_http_parser.c
[40/45] Compiling CBase32 base32.c
[41/45] Compiling CNIOOpenSSL shims.c
[42/45] Compiling CNIOOpenSSL helpers.c
[43/45] Compiling CCryptoOpenSSL shim.c
[44/54] Compiling c-atomics.c
[46/57] Compiling NIOPriorityQueue PriorityQueue.swift
[47/57] Compiling Debugging SourceLocation.swift
[48/57] Emitting module NIOConcurrencyHelpers
[49/57] Emitting module COperatingSystem
[50/57] Compiling COperatingSystem libc.swift
[51/58] Compiling Debugging Demangler.swift
[53/58] Emitting module NIOPriorityQueue
[54/58] Compiling NIOPriorityQueue Heap.swift
[55/59] Compiling NIOConcurrencyHelpers atomics.swift
[56/59] Compiling NIOConcurrencyHelpers lock.swift
[57/60] Emitting module Debugging
[58/60] Compiling Debugging Debuggable.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[62/111] Emitting module NIO
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[63/117] Compiling NIO ChannelPipeline.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[64/117] Compiling NIO CircularBuffer.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[65/117] Compiling NIO Codec.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[66/117] Compiling NIO CompositeError.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[67/117] Compiling NIO ContiguousCollection.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[68/117] Compiling NIO DeadChannel.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[69/117] Compiling NIO Embedded.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[70/117] Compiling NIO Heap.swift
[71/117] Compiling NIO IO.swift
[72/117] Compiling NIO IOData.swift
[73/117] Compiling NIO IntegerTypes.swift
[74/117] Compiling NIO Interfaces.swift
[75/117] Compiling NIO Linux.swift
[76/117] Compiling NIO LinuxCPUSet.swift
[77/117] Compiling NIO EventLoop.swift
[78/117] Compiling NIO EventLoopFuture.swift
[79/117] Compiling NIO FileDescriptor.swift
[80/117] Compiling NIO FileHandle.swift
[81/117] Compiling NIO FileRegion.swift
[82/117] Compiling NIO GetaddrinfoResolver.swift
[83/117] Compiling NIO HappyEyeballs.swift
[84/117] Compiling NIO RecvByteBufferAllocator.swift
[85/117] Compiling NIO Resolver.swift
[86/117] Compiling NIO Selectable.swift
[87/117] Compiling NIO Selector.swift
[88/117] Compiling NIO ServerSocket.swift
[89/117] Compiling NIO Socket.swift
[90/117] Compiling NIO SocketAddresses.swift
[91/117] Compiling NIO MarkedCircularBuffer.swift
[92/117] Compiling NIO MulticastChannel.swift
[93/117] Compiling NIO NIOAny.swift
[94/117] Compiling NIO NonBlockingFileIO.swift
[95/117] Compiling NIO PendingDatagramWritesManager.swift
[96/117] Compiling NIO PendingWritesManager.swift
[97/117] Compiling NIO PriorityQueue.swift
[98/117] Compiling NIO SocketChannel.swift
[99/117] Compiling NIO SocketOptionProvider.swift
[100/117] Compiling NIO System.swift
[101/117] Compiling NIO Thread.swift
[102/117] Compiling NIO TypeAssistedChannelHandler.swift
[103/117] Compiling NIO Utilities.swift
[104/117] Compiling NIO ByteBuffer-int.swift
[105/117] Compiling NIO ByteBuffer-views.swift
[106/117] Compiling NIO Channel.swift
[107/117] Compiling NIO ChannelHandler.swift
[108/117] Compiling NIO ChannelHandlers.swift
[109/117] Compiling NIO ChannelInvoker.swift
[110/117] Compiling NIO ChannelOption.swift
[111/117] Compiling NIO AddressedEnvelope.swift
[112/117] Compiling NIO BaseSocket.swift
[113/117] Compiling NIO BaseSocketChannel.swift
[114/117] Compiling NIO BlockingIOThreadPool.swift
[115/117] Compiling NIO Bootstrap.swift
[116/117] Compiling NIO ByteBuffer-aux.swift
[117/117] Compiling NIO ByteBuffer-core.swift
error: fatalError
warning: 'swift-nio-ssl-support': ignoring declared target(s) 'swift-nio-ssl-support' in the system package
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/9] Compiling NIO DeadChannel.swift
[3/9] Compiling NIO Codec.swift
[4/11] Compiling NIO ContiguousCollection.swift
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[5/12] Compiling NIO Embedded.swift
[6/16] Compiling NIO CompositeError.swift
[7/16] Compiling NIO CircularBuffer.swift
[8/24] Compiling NIO Bootstrap.swift
[9/24] Compiling NIO ChannelHandler.swift
[10/32] Compiling NIO ChannelHandlers.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[11/36] Emitting module NIO
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: type 'StaticString' does not conform to protocol 'Collection'
extension StaticString: Collection {
^
/host/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/ContiguousCollection.swift:21:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
extension StaticString: Collection {
^
Swift.Collection:3:12: note: 'subscript(_:)' declared here
    public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
           ^
Swift.Collection:14:5: note: requirement 'subscript(_:)' declared here
    subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }
    ^
[12/36] Compiling NIO ChannelPipeline.swift
[13/43] Compiling NIO HappyEyeballs.swift
[14/43] Compiling NIO Heap.swift
[15/43] Compiling NIO IO.swift
[16/43] Compiling NIO IOData.swift
[17/43] Compiling NIO IntegerTypes.swift
[18/43] Compiling NIO Interfaces.swift
[19/43] Compiling NIO LinuxCPUSet.swift
[20/43] Compiling NIO MarkedCircularBuffer.swift
[21/44] Compiling NIO EventLoop.swift
[22/44] Compiling NIO EventLoopFuture.swift
[23/44] Compiling NIO FileRegion.swift
[24/44] Compiling NIO GetaddrinfoResolver.swift
[25/44] Compiling NIO ByteBuffer-int.swift
[26/44] Compiling NIO ByteBuffer-views.swift
[27/44] Compiling NIO Channel.swift
[28/44] Compiling NIO ChannelInvoker.swift
[29/44] Compiling NIO SocketOptionProvider.swift
[30/44] Compiling NIO NIOAny.swift
[31/44] Compiling NIO NonBlockingFileIO.swift
[32/44] Compiling NIO PendingDatagramWritesManager.swift
[33/44] Compiling NIO PendingWritesManager.swift
[34/44] Compiling NIO SocketChannel.swift
[35/44] Compiling NIO System.swift
[36/44] Compiling NIO Thread.swift
[37/44] Compiling NIO BaseSocket.swift
[38/44] Compiling NIO BaseSocketChannel.swift
[39/44] Compiling NIO BlockingIOThreadPool.swift
[40/44] Compiling NIO ByteBuffer-core.swift
[41/44] Compiling NIO PriorityQueue.swift
[42/44] Compiling NIO RecvByteBufferAllocator.swift
[43/44] Compiling NIO Selector.swift
[44/44] Compiling NIO SocketAddresses.swift
error: fatalError
BUILD FAILURE 5.10 linux