The Swift Package Index logo.Swift Package Index

Has it really been five years since Swift Package Index launched? Read our anniversary blog post!

Build Information

Failed to build AsyncMonitor, reference main (c2a231), with Swift 6.1 for Android on 5 Nov 2025 18:32:45 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.68.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/samsonjs/AsyncMonitor.git
Reference: main
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/samsonjs/AsyncMonitor
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at c2a231a Fix a new warning for Swift 6.2
Cloned https://github.com/samsonjs/AsyncMonitor.git
Revision (git rev-parse @):
c2a231a40f8cb671cd53bc8273375bf8e6f5e74e
SUCCESS checkout https://github.com/samsonjs/AsyncMonitor.git at main
========================================
Build
========================================
Selected platform:         android
Swift version:             6.1
Building package at path:  $PWD
https://github.com/samsonjs/AsyncMonitor.git
https://github.com/samsonjs/AsyncMonitor.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AsyncMonitor",
  "name" : "AsyncMonitor",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "17.0"
    },
    {
      "name" : "macos",
      "version" : "14.0"
    }
  ],
  "products" : [
    {
      "name" : "AsyncMonitor",
      "targets" : [
        "AsyncMonitor"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AsyncMonitorTests",
      "module_type" : "SwiftTarget",
      "name" : "AsyncMonitorTests",
      "path" : "Tests/AsyncMonitorTests",
      "sources" : [
        "AnyAsyncCancellableTests.swift",
        "AsyncCancellableTests.swift",
        "AsyncMonitorTests.swift",
        "AsyncSequence+Just.swift",
        "NSObject+AsyncKVOTests.swift",
        "ReadmeExamples.swift",
        "TestCancellable.swift"
      ],
      "target_dependencies" : [
        "AsyncMonitor"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AsyncMonitor",
      "module_type" : "SwiftTarget",
      "name" : "AsyncMonitor",
      "path" : "Sources/AsyncMonitor",
      "product_memberships" : [
        "AsyncMonitor"
      ],
      "sources" : [
        "AnyAsyncCancellable.swift",
        "AsyncCancellable.swift",
        "AsyncMonitor.swift",
        "AsyncSequence+Extensions.swift",
        "NSObject+AsyncKVO.swift",
        "ValueLocker.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats 2>&1
android-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:496d77b037d0552dd779110e0d7093275ebb8376a63c7a364a5a4acca11a4ff5
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:android-6.1-latest
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/9] Compiling AsyncMonitor ValueLocker.swift
[4/9] Compiling AsyncMonitor AsyncSequence+Extensions.swift
[5/9] Compiling AsyncMonitor AsyncMonitor.swift
[6/9] Compiling AsyncMonitor AnyAsyncCancellable.swift
[7/9] Compiling AsyncMonitor AsyncCancellable.swift
[8/9] Emitting module AsyncMonitor
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:42:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
 40 |     func values<Value: Sendable>(
 41 |         for keyPath: KeyPath<Self, Value>,
 42 |         options: NSKeyValueObservingOptions = []
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:103:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
101 |     func monitorValues<Value: Sendable>(
102 |         for keyPath: KeyPath<Self, Value>,
103 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
104 |         changeHandler: @escaping (Value) -> Void
105 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:146:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
144 |     func monitorValues<Value: Sendable>(
145 |         for keyPath: KeyPath<Self, Value>,
146 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
147 |         changeHandler: @escaping @Sendable (Value) -> Void
148 |     ) -> any AsyncCancellable {
[9/9] Compiling AsyncMonitor NSObject+AsyncKVO.swift
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:42:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
 40 |     func values<Value: Sendable>(
 41 |         for keyPath: KeyPath<Self, Value>,
 42 |         options: NSKeyValueObservingOptions = []
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:103:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
101 |     func monitorValues<Value: Sendable>(
102 |         for keyPath: KeyPath<Self, Value>,
103 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
104 |         changeHandler: @escaping (Value) -> Void
105 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:146:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
144 |     func monitorValues<Value: Sendable>(
145 |         for keyPath: KeyPath<Self, Value>,
146 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
147 |         changeHandler: @escaping @Sendable (Value) -> Void
148 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:45:20: error: cannot find type 'NSKeyValueObservation' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
 45 |         let token: NSKeyValueObservation? = self.observe(keyPath, options: options) { object, _ in
    |                    `- error: cannot find type 'NSKeyValueObservation' in scope
 46 |             continuation.yield(object[keyPath: keyPath])
 47 |         }
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 2>&1
android-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:496d77b037d0552dd779110e0d7093275ebb8376a63c7a364a5a4acca11a4ff5
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:android-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/8] Compiling AsyncMonitor NSObject+AsyncKVO.swift
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:42:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
 40 |     func values<Value: Sendable>(
 41 |         for keyPath: KeyPath<Self, Value>,
 42 |         options: NSKeyValueObservingOptions = []
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:103:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
101 |     func monitorValues<Value: Sendable>(
102 |         for keyPath: KeyPath<Self, Value>,
103 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
104 |         changeHandler: @escaping (Value) -> Void
105 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:146:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
144 |     func monitorValues<Value: Sendable>(
145 |         for keyPath: KeyPath<Self, Value>,
146 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
147 |         changeHandler: @escaping @Sendable (Value) -> Void
148 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:45:20: error: cannot find type 'NSKeyValueObservation' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
 45 |         let token: NSKeyValueObservation? = self.observe(keyPath, options: options) { object, _ in
    |                    `- error: cannot find type 'NSKeyValueObservation' in scope
 46 |             continuation.yield(object[keyPath: keyPath])
 47 |         }
[3/8] Compiling AsyncMonitor ValueLocker.swift
[4/8] Compiling AsyncMonitor AsyncSequence+Extensions.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/8] Compiling AsyncMonitor AnyAsyncCancellable.swift
[6/8] Compiling AsyncMonitor AsyncCancellable.swift
[7/8] Compiling AsyncMonitor AsyncMonitor.swift
[8/8] Emitting module AsyncMonitor
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:42:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
 40 |     func values<Value: Sendable>(
 41 |         for keyPath: KeyPath<Self, Value>,
 42 |         options: NSKeyValueObservingOptions = []
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
 43 |     ) -> AsyncStream<Value> {
 44 |         let (stream, continuation) = AsyncStream<Value>.makeStream()
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:103:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
101 |     func monitorValues<Value: Sendable>(
102 |         for keyPath: KeyPath<Self, Value>,
103 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
104 |         changeHandler: @escaping (Value) -> Void
105 |     ) -> any AsyncCancellable {
/host/spi-builder-workspace/Sources/AsyncMonitor/NSObject+AsyncKVO.swift:146:18: error: cannot find type 'NSKeyValueObservingOptions' in scope
144 |     func monitorValues<Value: Sendable>(
145 |         for keyPath: KeyPath<Self, Value>,
146 |         options: NSKeyValueObservingOptions = [],
    |                  `- error: cannot find type 'NSKeyValueObservingOptions' in scope
147 |         changeHandler: @escaping @Sendable (Value) -> Void
148 |     ) -> any AsyncCancellable {
BUILD FAILURE 6.1 android