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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 ShellKit, reference master (da8dcb), with Swift 6.0 for macOS (SPM) on 31 Oct 2024 11:54:22 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/einstore/shellkit.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/einstore/shellkit
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at da8dcb4 formatting
Cloned https://github.com/einstore/shellkit.git
Revision (git rev-parse @):
da8dcb4252a5cb479094559d111d3a221689ae2b
SUCCESS checkout https://github.com/einstore/shellkit.git at master
Fetching https://github.com/IBM-Swift/BlueSocket
Fetching https://github.com/jakeheis/CSSH
Fetching https://github.com/Einstore/Shout.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/Einstore/WebErrorKit.git
[1/28] Fetching weberrorkit
[29/54] Fetching weberrorkit, cssh
[55/466] Fetching weberrorkit, cssh, shout
[224/3408] Fetching weberrorkit, cssh, shout, bluesocket
Fetched https://github.com/Einstore/WebErrorKit.git from cache (0.79s)
Fetched https://github.com/Einstore/Shout.git from cache (0.79s)
[615/2968] Fetching cssh, bluesocket
Fetched https://github.com/IBM-Swift/BlueSocket from cache (1.17s)
[1/71106] Fetching swift-nio
Fetched https://github.com/jakeheis/CSSH from cache (9.11s)
Fetched https://github.com/apple/swift-nio.git from cache (9.11s)
Computing version for https://github.com/Einstore/Shout.git
Computed https://github.com/Einstore/Shout.git at 0.5.1 (2.61s)
Computing version for https://github.com/Einstore/WebErrorKit.git
Computed https://github.com/Einstore/WebErrorKit.git at 0.0.1 (0.64s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.7.0 (0.64s)
Computing version for https://github.com/jakeheis/CSSH
Computed https://github.com/jakeheis/CSSH at 1.0.3 (1.05s)
Computing version for https://github.com/IBM-Swift/BlueSocket
Computed https://github.com/IBM-Swift/BlueSocket at 1.0.48 (0.75s)
Creating working copy for https://github.com/Einstore/Shout.git
Working copy of https://github.com/Einstore/Shout.git resolved at 0.5.1
Creating working copy for https://github.com/Einstore/WebErrorKit.git
Working copy of https://github.com/Einstore/WebErrorKit.git resolved at 0.0.1
Creating working copy for https://github.com/IBM-Swift/BlueSocket
Working copy of https://github.com/IBM-Swift/BlueSocket resolved at 1.0.48
Creating working copy for https://github.com/jakeheis/CSSH
Working copy of https://github.com/jakeheis/CSSH resolved at 1.0.3
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.7.0
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "shellkit",
      "name": "ShellKit",
      "url": "https://github.com/einstore/shellkit.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/shellkit",
      "dependencies": [
        {
          "identity": "swift-nio",
          "name": "swift-nio",
          "url": "https://github.com/apple/swift-nio.git",
          "version": "2.76.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-nio",
          "dependencies": [
            {
              "identity": "swift-atomics",
              "name": "swift-atomics",
              "url": "https://github.com/apple/swift-atomics.git",
              "version": "1.2.0",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-atomics",
              "dependencies": [
              ]
            },
            {
              "identity": "swift-collections",
              "name": "swift-collections",
              "url": "https://github.com/apple/swift-collections.git",
              "version": "1.1.4",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-collections",
              "dependencies": [
              ]
            },
            {
              "identity": "swift-system",
              "name": "swift-system",
              "url": "https://github.com/apple/swift-system.git",
              "version": "1.4.0",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-system",
              "dependencies": [
              ]
            }
          ]
        },
        {
          "identity": "weberrorkit",
          "name": "WebError",
          "url": "https://github.com/Einstore/WebErrorKit.git",
          "version": "0.0.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/WebErrorKit",
          "dependencies": [
          ]
        },
        {
          "identity": "shout",
          "name": "Shout",
          "url": "https://github.com/Einstore/Shout.git",
          "version": "0.5.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Shout",
          "dependencies": [
            {
              "identity": "bluesocket",
              "name": "Socket",
              "url": "https://github.com/IBM-Swift/BlueSocket",
              "version": "1.0.200",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/BlueSocket",
              "dependencies": [
              ]
            },
            {
              "identity": "cssh",
              "name": "CSSH",
              "url": "https://github.com/jakeheis/CSSH",
              "version": "1.0.3",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/CSSH",
              "dependencies": [
              ]
            }
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/einstore/shellkit.git
[1/273] Fetching shellkit
Fetched https://github.com/einstore/shellkit.git from cache (0.71s)
Fetching https://github.com/Einstore/WebErrorKit.git from cache
Fetching https://github.com/Einstore/Shout.git from cache
Fetching https://github.com/apple/swift-nio.git from cache
Fetched https://github.com/Einstore/Shout.git from cache (0.71s)
Fetched https://github.com/Einstore/WebErrorKit.git from cache (0.71s)
Fetched https://github.com/apple/swift-nio.git from cache (0.71s)
Computing version for https://github.com/Einstore/Shout.git
Computed https://github.com/Einstore/Shout.git at 0.5.1 (0.02s)
Fetching https://github.com/IBM-Swift/BlueSocket from cache
Fetching https://github.com/jakeheis/CSSH from cache
Fetched https://github.com/IBM-Swift/BlueSocket from cache (0.58s)
Fetched https://github.com/jakeheis/CSSH from cache (0.58s)
Computing version for https://github.com/Einstore/WebErrorKit.git
Computed https://github.com/Einstore/WebErrorKit.git at 0.0.1 (0.02s)
Computing version for https://github.com/jakeheis/CSSH
Computed https://github.com/jakeheis/CSSH at 1.0.3 (0.02s)
Computing version for https://github.com/IBM-Swift/BlueSocket
Computed https://github.com/IBM-Swift/BlueSocket at 1.0.200 (0.65s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.76.1 (0.72s)
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-system.git
[1/1569] Fetching swift-atomics
[64/5470] Fetching swift-atomics, swift-system
[1160/20945] Fetching swift-atomics, swift-system, swift-collections
Fetched https://github.com/apple/swift-system.git from cache (1.08s)
[2498/17044] Fetching swift-atomics, swift-collections
Fetched https://github.com/apple/swift-atomics.git from cache (2.07s)
Fetched https://github.com/apple/swift-collections.git from cache (2.07s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.4.0 (0.49s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.2.0 (0.50s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.1.4 (0.74s)
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.1.4
Creating working copy for https://github.com/IBM-Swift/BlueSocket
Working copy of https://github.com/IBM-Swift/BlueSocket resolved at 1.0.200
Creating working copy for https://github.com/Einstore/Shout.git
Working copy of https://github.com/Einstore/Shout.git resolved at 0.5.1
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.4.0
Creating working copy for https://github.com/Einstore/WebErrorKit.git
Working copy of https://github.com/Einstore/WebErrorKit.git resolved at 0.0.1
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.2.0
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.76.1
Creating working copy for https://github.com/einstore/shellkit.git
Working copy of https://github.com/einstore/shellkit.git resolved at master (da8dcb4)
Creating working copy for https://github.com/jakeheis/CSSH
Working copy of https://github.com/jakeheis/CSSH resolved at 1.0.3
warning: 'cssh': ignoring declared target(s) 'CSSH' in the system package
warning: '.resolve-product-dependencies': dependency 'shellkit' is not used by any target
Found 3 product dependencies
  - swift-nio
  - WebError
  - Shout
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/einstore/shellkit.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/17] Write sources
[11/17] Write swift-version--7754E27361AE5C74.txt
[12/17] Compiling CNIOLinux ifaddrs-android.c
[13/17] Compiling CNIOLinux shim.c
[14/29] Compiling CNIODarwin shim.c
[15/29] Compiling CNIOSHA1 c_nio_sha1.c
[16/29] Compiling c-atomics.c
[18/32] Compiling NIOConcurrencyHelpers atomics.swift
[19/32] Emitting module NIOConcurrencyHelpers
[20/32] Compiling NIOConcurrencyHelpers lock.swift
[21/83] Compiling NIO PendingWritesManager.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingWritesManager.swift:134:27: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
132 |     /// - parameters:
133 |     ///     - bytes: How many bytes of the item were written.
134 |     private mutating func partiallyWrittenFirst(bytes: Int) {
    |                           `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
135 |         self.pendingWrites[self.pendingWrites.startIndex].data.moveReaderIndex(forwardBy: bytes)
136 |         self.subtractOutstanding(bytes: bytes)
[22/83] Compiling NIO PriorityQueue.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingWritesManager.swift:134:27: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
132 |     /// - parameters:
133 |     ///     - bytes: How many bytes of the item were written.
134 |     private mutating func partiallyWrittenFirst(bytes: Int) {
    |                           `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
135 |         self.pendingWrites[self.pendingWrites.startIndex].data.moveReaderIndex(forwardBy: bytes)
136 |         self.subtractOutstanding(bytes: bytes)
[23/83] Compiling NIO RecvByteBufferAllocator.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingWritesManager.swift:134:27: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
132 |     /// - parameters:
133 |     ///     - bytes: How many bytes of the item were written.
134 |     private mutating func partiallyWrittenFirst(bytes: Int) {
    |                           `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
135 |         self.pendingWrites[self.pendingWrites.startIndex].data.moveReaderIndex(forwardBy: bytes)
136 |         self.subtractOutstanding(bytes: bytes)
[24/83] Compiling NIO Resolver.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingWritesManager.swift:134:27: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
132 |     /// - parameters:
133 |     ///     - bytes: How many bytes of the item were written.
134 |     private mutating func partiallyWrittenFirst(bytes: Int) {
    |                           `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
135 |         self.pendingWrites[self.pendingWrites.startIndex].data.moveReaderIndex(forwardBy: bytes)
136 |         self.subtractOutstanding(bytes: bytes)
[25/83] Compiling NIO Selectable.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingWritesManager.swift:134:27: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
132 |     /// - parameters:
133 |     ///     - bytes: How many bytes of the item were written.
134 |     private mutating func partiallyWrittenFirst(bytes: Int) {
    |                           `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
135 |         self.pendingWrites[self.pendingWrites.startIndex].data.moveReaderIndex(forwardBy: bytes)
136 |         self.subtractOutstanding(bytes: bytes)
[26/88] Compiling WebErrorKit WebErrorContent.swift
[27/88] Compiling WebErrorKit WebError.swift
[28/88] Compiling WebErrorKit SerializableWebError.swift
[29/88] Emitting module WebErrorKit
[30/88] Compiling WebErrorKit String+Codify.swift
[31/88] Compiling NIO SocketOptionProvider.swift
[32/88] Compiling NIO System.swift
[33/88] Compiling NIO Thread.swift
[34/88] Compiling NIO TypeAssistedChannelHandler.swift
[35/88] Compiling NIO Utilities.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[36/88] Compiling NIO Embedded.swift
[37/88] Compiling NIO EventLoop.swift
[38/88] Compiling NIO EventLoopFuture.swift
[39/88] Compiling NIO FileDescriptor.swift
[40/88] Compiling NIO FileHandle.swift
[41/88] Compiling NIO FileRegion.swift
[42/88] Emitting module NIO
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[43/88] Compiling NIO GetaddrinfoResolver.swift
[44/88] Compiling NIO HappyEyeballs.swift
[45/88] Compiling NIO Heap.swift
[46/88] Compiling NIO IO.swift
[47/88] Compiling NIO IOData.swift
[48/88] Compiling NIO IntegerTypes.swift
[49/88] Compiling NIO ByteBuffer-int.swift
[50/88] Compiling NIO ByteBuffer-views.swift
[51/88] Compiling NIO Channel.swift
[52/88] Compiling NIO ChannelHandler.swift
[53/88] Compiling NIO ChannelHandlers.swift
[54/88] Compiling NIO ChannelInvoker.swift
[55/88] Compiling NIO Selector.swift
[56/88] Compiling NIO ServerSocket.swift
[57/88] Compiling NIO Socket.swift
[58/88] Compiling NIO SocketAddresses.swift
[59/88] Compiling NIO SocketChannel.swift
[60/88] Compiling NIO NIOAny.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingDatagramWritesManager.swift:326:17: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
324 |             while let markedIndex = self.markedIndex, self.pendingWrites.pendingWrites.distance(from: self.index,
325 |                                                                                                 to: markedIndex) >= 0 {
326 |                 let element = self.pendingWrites.pendingWrites[index]
    |                 `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
327 |                 index = self.pendingWrites.pendingWrites.index(after: index)
328 |                 return element
[61/88] Compiling NIO NIOCloseOnErrorHandler.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingDatagramWritesManager.swift:326:17: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
324 |             while let markedIndex = self.markedIndex, self.pendingWrites.pendingWrites.distance(from: self.index,
325 |                                                                                                 to: markedIndex) >= 0 {
326 |                 let element = self.pendingWrites.pendingWrites[index]
    |                 `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
327 |                 index = self.pendingWrites.pendingWrites.index(after: index)
328 |                 return element
[62/88] Compiling NIO NIOThreadPool.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingDatagramWritesManager.swift:326:17: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
324 |             while let markedIndex = self.markedIndex, self.pendingWrites.pendingWrites.distance(from: self.index,
325 |                                                                                                 to: markedIndex) >= 0 {
326 |                 let element = self.pendingWrites.pendingWrites[index]
    |                 `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
327 |                 index = self.pendingWrites.pendingWrites.index(after: index)
328 |                 return element
[63/88] Compiling NIO NonBlockingFileIO.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingDatagramWritesManager.swift:326:17: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
324 |             while let markedIndex = self.markedIndex, self.pendingWrites.pendingWrites.distance(from: self.index,
325 |                                                                                                 to: markedIndex) >= 0 {
326 |                 let element = self.pendingWrites.pendingWrites[index]
    |                 `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
327 |                 index = self.pendingWrites.pendingWrites.index(after: index)
328 |                 return element
[64/88] Compiling NIO PendingDatagramWritesManager.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/PendingDatagramWritesManager.swift:326:17: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
324 |             while let markedIndex = self.markedIndex, self.pendingWrites.pendingWrites.distance(from: self.index,
325 |                                                                                                 to: markedIndex) >= 0 {
326 |                 let element = self.pendingWrites.pendingWrites[index]
    |                 `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
327 |                 index = self.pendingWrites.pendingWrites.index(after: index)
328 |                 return element
[65/88] Compiling NIO Interfaces.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:121:40: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
119 |     /// Returns the marked element.
120 |     @inlinable
121 |     public var markedElement: Element? {
    |                                        `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
122 |         return self.markedElementIndex.map { self._buffer[$0] }
123 |     }
[66/88] Compiling NIO Linux.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:121:40: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
119 |     /// Returns the marked element.
120 |     @inlinable
121 |     public var markedElement: Element? {
    |                                        `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
122 |         return self.markedElementIndex.map { self._buffer[$0] }
123 |     }
[67/88] Compiling NIO LinuxCPUSet.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:121:40: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
119 |     /// Returns the marked element.
120 |     @inlinable
121 |     public var markedElement: Element? {
    |                                        `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
122 |         return self.markedElementIndex.map { self._buffer[$0] }
123 |     }
[68/88] Compiling NIO MarkedCircularBuffer.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:121:40: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
119 |     /// Returns the marked element.
120 |     @inlinable
121 |     public var markedElement: Element? {
    |                                        `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
122 |         return self.markedElementIndex.map { self._buffer[$0] }
123 |     }
[69/88] Compiling NIO MulticastChannel.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: type 'MarkedCircularBuffer<Element>' does not conform to protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:132:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
130 | }
131 |
132 | extension MarkedCircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
133 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
134 |     public typealias Index = CircularBuffer<Element>.Index
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/MarkedCircularBuffer.swift:121:40: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
119 |     /// Returns the marked element.
120 |     @inlinable
121 |     public var markedElement: Element? {
    |                                        `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
122 |         return self.markedElementIndex.map { self._buffer[$0] }
123 |     }
[70/88] Compiling NIO ChannelOption.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[71/88] Compiling NIO ChannelPipeline.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[72/88] Compiling NIO CircularBuffer.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[73/88] Compiling NIO Codec.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[74/88] Compiling NIO DatagramVectorReadManager.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[75/88] Compiling NIO DeadChannel.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: type 'CircularBuffer<Element>' does not conform to protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-nio/Sources/NIO/CircularBuffer.swift:106:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
104 |
105 | // MARK: Collection/MutableCollection implementation
106 | extension CircularBuffer: Collection, MutableCollection {
    | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'MutableCollection'
107 |     public typealias RangeType<Bound> = Range<Bound> where Bound: Strideable, Bound.Stride: SignedInteger
108 |     public typealias SubSequence = CircularBuffer<Element>
Swift.MutableCollection:8:12: note: 'subscript(_:)' declared here
 6 |     @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }
 7 |     @available(*, unavailable)
 8 |     public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |            `- note: 'subscript(_:)' declared here
 9 |     @inlinable public mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
10 | }
Swift.MutableCollection:6:14: note: requirement 'subscript(_:)' declared here
 4 |     associatedtype SubSequence
 5 |     override subscript(position: Self.Index) -> Self.Element { get set }
 6 |     override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get set }
   |              `- note: requirement 'subscript(_:)' declared here
 7 |     mutating func partition(by belongsInSecondPartition: (Self.Element) throws -> Bool) rethrows -> Self.Index
 8 |     mutating func swapAt(_ i: Self.Index, _ j: Self.Index)
[76/88] Compiling NIO AddressedEnvelope.swift
[77/88] Compiling NIO BaseSocket.swift
[78/88] Compiling NIO BaseSocketChannel.swift
[79/88] Compiling NIO Bootstrap.swift
[80/88] Compiling NIO ByteBuffer-aux.swift
[81/88] Compiling NIO ByteBuffer-core.swift
[82/88] Compiling WebErrorKit WebError+Serializable.swift
[83/88] Compiling WebErrorKit WebError+RawRepresentable.swift
[84/88] Emitting module Socket
warning: 'cssh': ignoring declared target(s) 'CSSH' in the system package
warning: failed to retrieve search paths with pkg-config; maybe pkg-config is not installed
warning: you may be able to install libssh2 using your system-packager:
    brew install libssh2
BUILD FAILURE 6.0 macosSpm