Swift Package Index

Build Information

Failed to build Signaling, reference main (687d3c), with Swift 6.1 for Wasm on 21 Jan 2026 12:54:13 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.68.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/josshad/Signaling.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/josshad/Signaling
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 687d3cb Signaling
Cloned https://github.com/josshad/Signaling.git
Revision (git rev-parse @):
687d3cb9ddf87355337e6e5ab71f21a557ff66cf
SUCCESS checkout https://github.com/josshad/Signaling.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/josshad/Signaling.git
https://github.com/josshad/Signaling.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "rxswift",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "6.0.0",
            "upper_bound" : "7.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/ReactiveX/RxSwift.git"
    },
    {
      "identity" : "combine-schedulers",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/combine-schedulers"
    }
  ],
  "manifest_display_name" : "Signaling",
  "name" : "Signaling",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "CombineSignaling",
      "targets" : [
        "CombineSignaling"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "RxSignaing",
      "targets" : [
        "RxSignaing"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RxSignaingTests",
      "module_type" : "SwiftTarget",
      "name" : "RxSignaingTests",
      "path" : "Tests/RxSignaingTests",
      "product_dependencies" : [
        "RxSwift"
      ],
      "sources" : [
        "RxSignaingTests.swift"
      ],
      "target_dependencies" : [
        "RxSignaing"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RxSignaing",
      "module_type" : "SwiftTarget",
      "name" : "RxSignaing",
      "path" : "Sources/RxSignaing",
      "product_dependencies" : [
        "RxSwift",
        "RxCocoa"
      ],
      "product_memberships" : [
        "RxSignaing"
      ],
      "sources" : [
        "Signaing.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CombineSignalingTests",
      "module_type" : "SwiftTarget",
      "name" : "CombineSignalingTests",
      "path" : "Tests/CombineSignalingTests",
      "product_dependencies" : [
        "CombineSchedulers"
      ],
      "sources" : [
        "CombineSignalingTests.swift",
        "SignalTests.swift"
      ],
      "target_dependencies" : [
        "CombineSignaling"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CombineSignaling",
      "module_type" : "SwiftTarget",
      "name" : "CombineSignaling",
      "path" : "Sources/CombineSignaling",
      "product_memberships" : [
        "CombineSignaling"
      ],
      "sources" : [
        "Signal.swift",
        "Signaling.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.1"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
wasm-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:bb5ef85e2f3936cf1d2ae6dee7e011cebd8377061043dcf9368e6726baaf85d8
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:wasm-6.1-latest
Fetching https://github.com/ReactiveX/RxSwift.git
Fetching https://github.com/pointfreeco/combine-schedulers
[1/2542] Fetching combine-schedulers
[2543/56321] Fetching combine-schedulers, rxswift
Fetched https://github.com/pointfreeco/combine-schedulers from cache (5.53s)
Fetched https://github.com/ReactiveX/RxSwift.git from cache (5.70s)
Computing version for https://github.com/pointfreeco/combine-schedulers
Computed https://github.com/pointfreeco/combine-schedulers at 1.1.0 (6.44s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay
Fetching https://github.com/pointfreeco/swift-concurrency-extras
Fetching https://github.com/OpenCombine/OpenCombine.git
[1/886] Fetching swift-concurrency-extras
[887/9170] Fetching swift-concurrency-extras, opencombine
[1136/14777] Fetching swift-concurrency-extras, opencombine, xctest-dynamic-overlay
Fetched https://github.com/pointfreeco/swift-concurrency-extras from cache (0.56s)
Fetched https://github.com/OpenCombine/OpenCombine.git from cache (0.68s)
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.69s)
Computing version for https://github.com/OpenCombine/OpenCombine.git
Computed https://github.com/OpenCombine/OpenCombine.git at 0.14.0 (2.98s)
Computing version for https://github.com/pointfreeco/swift-concurrency-extras
Computed https://github.com/pointfreeco/swift-concurrency-extras at 1.3.2 (0.51s)
Computing version for https://github.com/ReactiveX/RxSwift.git
Computed https://github.com/ReactiveX/RxSwift.git at 6.9.1 (0.54s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.8.1 (0.52s)
Creating working copy for https://github.com/pointfreeco/combine-schedulers
Working copy of https://github.com/pointfreeco/combine-schedulers resolved at 1.1.0
Creating working copy for https://github.com/pointfreeco/swift-concurrency-extras
Working copy of https://github.com/pointfreeco/swift-concurrency-extras resolved at 1.3.2
Creating working copy for https://github.com/OpenCombine/OpenCombine.git
Working copy of https://github.com/OpenCombine/OpenCombine.git resolved at 0.14.0
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.8.1
Creating working copy for https://github.com/ReactiveX/RxSwift.git
Working copy of https://github.com/ReactiveX/RxSwift.git resolved at 6.9.1
Building for debugging...
[0/9] Write sources
[0/9] Copying PrivacyInfo.xcprivacy
[0/9] Write sources
[4/9] Copying PrivacyInfo.xcprivacy
[5/9] Write sources
[7/9] Copying PrivacyInfo.xcprivacy
[8/9] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[10/156] Emitting module CombineSignaling
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
[11/156] Compiling CombineSignaling Signaling.swift
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
[12/156] Compiling CombineSignaling Signal.swift
<unknown>:0: warning: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: warning: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
error: emit-module command failed with exit code 1 (use -v to see invocation)
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/CoreFoundation.h:28:10: note: while building module 'wasi_emulated_signal' imported from /root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/CoreFoundation.h:28:
 26 | #include <setjmp.h>
 27 | #endif
 28 | #include <signal.h>
    |          `- note: while building module 'wasi_emulated_signal' imported from /root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/CoreFoundation.h:28:
 29 | #include <stddef.h>
 30 | #include <stdio.h>
<module-includes>:1:10: note: in file included from <module-includes>:1:
1 | #include "signal.h"
  |          `- note: in file included from <module-includes>:1:
2 |
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/wasm32-wasi/signal.h:2:2: error: "wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
  1 | #ifndef _WASI_EMULATED_SIGNAL
  2 | #error "wasm lacks signal support; to enable minimal signal emulation, \
    |  `- error: "wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
  3 | compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
  4 | #else
<module-includes>:1:10: note: in file included from <module-includes>:1:
1 | #include "CoreFoundation.h"
  |          `- note: in file included from <module-includes>:1:
2 |
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/CoreFoundation.h:28:10: error: could not build module 'wasi_emulated_signal'
 26 | #include <setjmp.h>
 27 | #endif
 28 | #include <signal.h>
    |          `- error: could not build module 'wasi_emulated_signal'
 29 | #include <stddef.h>
 30 | #include <stdio.h>
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/ForSwiftFoundationOnly.h:86:10: note: while building module 'wasi_emulated_mman' imported from /root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/ForSwiftFoundationOnly.h:86:
 84 | #undef _WASI_EMULATED_MMAN
 85 | #define _WASI_EMULATED_MMAN
 86 | #include <sys/mman.h>
    |          `- note: while building module 'wasi_emulated_mman' imported from /root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/swift.xctoolchain/usr/lib/swift_static/CoreFoundation/ForSwiftFoundationOnly.h:86:
 87 | #elif TARGET_OS_LINUX
 88 | #include <errno.h>
<module-includes>:1:10: note: in file included from <module-includes>:1:
1 | #include "sys/mman.h"
  |          `- note: in file included from <module-includes>:1:
2 |
/root/.swiftpm/swift-sdks/swift-wasm-6.1-RELEASE-wasm32-unknown-wasi.artifactbundle/6.1-RELEASE-wasm32-unknown-wasi/wasm32-unknown-wasi/WASI.sdk/include/wasm32-wasi/sys/mman.h:2:2: error: "WASI lacks a true mmap; to enable minimal mmap emulation, compile with -D_WASI_EMULATED_MMAN and link with -lwasi-emulated-mman"
  1 | #ifndef _WASI_EMULATED_MMAN
  2 | #error "WASI lacks a true mmap; to enable minimal mmap emulation, \
    |  `- error: "WASI lacks a true mmap; to enable minimal mmap emulation, compile with -D_WASI_EMULATED_MMAN and link with -lwasi-emulated-mman"
  3 | compile with -D_WASI_EMULATED_MMAN and link with -lwasi-emulated-mman"
  4 | #else
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1
wasm-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:bb5ef85e2f3936cf1d2ae6dee7e011cebd8377061043dcf9368e6726baaf85d8
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:wasm-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/111] Emitting module CombineSignaling
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
[3/112] Compiling CombineSignaling Signaling.swift
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
[4/112] Compiling CombineSignaling Signal.swift
/host/spi-builder-workspace/Sources/CombineSignaling/Signal.swift:2:8: error: no such module 'Combine'
 1 | import Foundation
 2 | import Combine
   |        `- error: no such module 'Combine'
 3 |
 4 | public struct Signal<Output> {
BUILD FAILURE 6.1 wasm