Swift Package IndexBuild Information
Failed to build package-histogram, reference 0.2.0 (c2e121), with Swift 6.1 for Android on 24 Apr 2026 16:43:05 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/swiftpackageindex/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 2>&1Build Log
========================================
RunAll
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Builder version: 4.70.0
Interrupt handler set up.
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Checkout
========================================
Clone URL: https://github.com/HdrHistogram/hdrhistogram-swift.git
Reference: 0.2.0
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/HdrHistogram/hdrhistogram-swift
* tag 0.2.0 -> FETCH_HEAD
HEAD is now at c2e1210 feat(minor): enable cross-module specialisation of iterators + add Histogram.add(_:) (#30)
Cloned https://github.com/HdrHistogram/hdrhistogram-swift.git
Revision (git rev-parse @):
c2e1210df04b4fff47e53f2f9dad9cc45ae15d63
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/HdrHistogram/hdrhistogram-swift.git at 0.2.0
========================================
Build
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Selected platform: android
Swift version: 6.1
Building package at path: $PWD
https://github.com/HdrHistogram/hdrhistogram-swift.git
https://github.com/HdrHistogram/hdrhistogram-swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 -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
android-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d37fe7b8fba27dae59fb1d9d7dfa86b38b41ffb3975924aad6f05cb4cc3de131
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest
Fetching https://github.com/apple/swift-numerics
Fetching https://github.com/apple/swift-docc-plugin
[1/2277] Fetching swift-docc-plugin
[252/8693] Fetching swift-docc-plugin, swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (0.55s)
Fetched https://github.com/apple/swift-docc-plugin from cache (0.56s)
Computing version for https://github.com/apple/swift-docc-plugin
Computed https://github.com/apple/swift-docc-plugin at 1.4.6 (1.41s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/3675] Fetching swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.41s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (1.15s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.1.1 (0.57s)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at 1.4.6
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.1.1
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/16] Write sources
[7/16] Compiling _NumericsShims _NumericsShims.c
[7/16] Write swift-version-24593BA9C3E375BF.txt
[10/27] Compiling RealModule RealFunctions.swift
[11/28] Compiling RealModule Real.swift
[12/28] Compiling RealModule RelaxedArithmetic.swift
[13/28] Compiling RealModule Float80+Real.swift
[14/28] Compiling RealModule ElementaryFunctions.swift
[15/28] Compiling RealModule Float+Real.swift
[16/28] Compiling RealModule Float16+Real.swift
[17/28] Compiling RealModule AugmentedArithmetic.swift
[18/28] Compiling RealModule Double+Real.swift
[19/28] Compiling RealModule AlgebraicField.swift
[20/28] Compiling RealModule ApproximateEquality.swift
[21/28] Emitting module RealModule
[22/29] Wrapping AST for RealModule for debugging
[24/40] Compiling ComplexModule Complex+Numeric.swift
[25/40] Compiling ComplexModule Polar.swift
[26/41] Compiling ComplexModule Complex+StringConvertible.swift
[27/41] Compiling ComplexModule Complex.swift
[28/41] Compiling ComplexModule Scale.swift
[29/41] Compiling ComplexModule Complex+Hashable.swift
[30/41] Compiling ComplexModule Complex+IntegerLiteral.swift
[31/41] Compiling ComplexModule Complex+AdditiveArithmetic.swift
[32/41] Compiling ComplexModule Complex+AlgebraicField.swift
[33/41] Compiling ComplexModule Complex+Codable.swift
[34/41] Compiling ComplexModule Complex+ElementaryFunctions.swift
[35/41] Emitting module ComplexModule
[36/42] Wrapping AST for ComplexModule for debugging
[38/44] Emitting module Numerics
[39/44] Compiling Numerics Numerics.swift
[40/45] Wrapping AST for Numerics for debugging
[42/47] Emitting module Histogram
[43/47] Compiling Histogram Histogram.swift
/host/spi-builder-workspace/Sources/Histogram/Histogram.swift:1532:25: error: cannot find 'vsnprintf' in scope
1530 | // string.
1531 | 0..<bufferSize ~= format.withCString {
1532 | Int(vsnprintf(ptr.baseAddress, bufferSize, $0, va_list))
| `- error: cannot find 'vsnprintf' in scope
1533 | }
1534 | }
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest swift build --swift-sdk aarch64-unknown-linux-android24 2>&1
android-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d37fe7b8fba27dae59fb1d9d7dfa86b38b41ffb3975924aad6f05cb4cc3de131
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest
[0/1] Planning build
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/10] Write swift-version-24593BA9C3E375BF.txt
[4/21] Compiling RealModule Real.swift
[5/22] Compiling RealModule Float80+Real.swift
[6/22] Compiling RealModule RealFunctions.swift
[7/22] Compiling RealModule RelaxedArithmetic.swift
[8/22] Compiling RealModule ElementaryFunctions.swift
[9/22] Compiling RealModule Float+Real.swift
[10/22] Compiling RealModule Float16+Real.swift
[11/22] Compiling RealModule AugmentedArithmetic.swift
[12/22] Compiling RealModule Double+Real.swift
[13/22] Compiling RealModule AlgebraicField.swift
[14/22] Compiling RealModule ApproximateEquality.swift
[15/22] Emitting module RealModule
[16/23] Wrapping AST for RealModule for debugging
[18/34] Compiling ComplexModule Polar.swift
[19/35] Compiling ComplexModule Complex+StringConvertible.swift
[20/35] Compiling ComplexModule Complex.swift
[21/35] Compiling ComplexModule Scale.swift
[22/35] Compiling ComplexModule Complex+Hashable.swift
[23/35] Compiling ComplexModule Complex+IntegerLiteral.swift
[24/35] Compiling ComplexModule Complex+Numeric.swift
[25/35] Compiling ComplexModule Complex+AdditiveArithmetic.swift
[26/35] Compiling ComplexModule Complex+AlgebraicField.swift
[27/35] Emitting module ComplexModule
[28/35] Compiling ComplexModule Complex+Codable.swift
[29/35] Compiling ComplexModule Complex+ElementaryFunctions.swift
[30/36] Wrapping AST for ComplexModule for debugging
[32/38] Emitting module Numerics
[33/38] Compiling Numerics Numerics.swift
[35/40] Emitting module Histogram
[36/40] Compiling Histogram Histogram.swift
/host/spi-builder-workspace/Sources/Histogram/Histogram.swift:1532:25: error: cannot find 'vsnprintf' in scope
1530 | // string.
1531 | 0..<bufferSize ~= format.withCString {
1532 | Int(vsnprintf(ptr.baseAddress, bufferSize, $0, va_list))
| `- error: cannot find 'vsnprintf' in scope
1533 | }
1534 | }
BUILD FAILURE 6.1 android