Swift Package IndexBuild Information
Failed to build SwiftGrad, reference main (55fd4d), with Swift 6.1 for Android on 17 Mar 2026 01:36:19 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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
========================================
Builder version: 4.69.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/SwiftAutograd/SwiftGrad.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/SwiftAutograd/SwiftGrad
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 55fd4d3 Update snake demo GIF showing episodes 100-300
Cloned https://github.com/SwiftAutograd/SwiftGrad.git
Revision (git rev-parse @):
55fd4d3e2a6799a05650ec54886e735a0be7de4f
SUCCESS checkout https://github.com/SwiftAutograd/SwiftGrad.git at main
========================================
Build
========================================
Selected platform: android
Swift version: 6.1
Building package at path: $PWD
https://github.com/SwiftAutograd/SwiftGrad.git
https://github.com/SwiftAutograd/SwiftGrad.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
"dependencies" : [
],
"manifest_display_name" : "SwiftGrad",
"name" : "SwiftGrad",
"path" : "/host/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "SwiftGrad",
"targets" : [
"SwiftGrad"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "SwiftGradTests",
"module_type" : "SwiftTarget",
"name" : "SwiftGradTests",
"path" : "Tests/SwiftGradTests",
"sources" : [
"SwiftGradTests.swift"
],
"target_dependencies" : [
"SwiftGrad"
],
"type" : "test"
},
{
"c99name" : "SwiftGrad",
"module_type" : "SwiftTarget",
"name" : "SwiftGrad",
"path" : "Sources/SwiftGrad",
"product_memberships" : [
"SwiftGrad"
],
"sources" : [
"Engine.swift",
"Losses.swift",
"NN.swift",
"SwiftGrad.swift"
],
"type" : "library"
}
],
"tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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 2>&1
android-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:4aaa9704d9ec48004f0d4dbd1faa76d47dfce67570c934d5c9f7c1557cee5c73
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/7] Compiling SwiftGrad SwiftGrad.swift
[4/7] Emitting module SwiftGrad
[5/7] Compiling SwiftGrad Engine.swift
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:77:17: error: cannot find 'Darwin' in scope
75 | /// Tanh activation
76 | public func tanh() -> Value {
77 | let t = Darwin.tanh(data)
| `- error: cannot find 'Darwin' in scope
78 | let out = Value(t, children: [self], op: "tanh")
79 | out._backward = { [weak self, weak out] in
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:89:25: error: cannot find 'Darwin' in scope
87 | public func log() -> Value {
88 | let base = data
89 | let out = Value(Darwin.log(data), children: [self], op: "log")
| `- error: cannot find 'Darwin' in scope
90 | out._backward = { [weak self, weak out] in
91 | guard let self, let out else { return }
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:99:17: error: cannot find 'Darwin' in scope
97 | /// Exponential: e^self
98 | public func exp() -> Value {
99 | let e = Darwin.exp(data)
| `- error: cannot find 'Darwin' in scope
100 | let out = Value(e, children: [self], op: "exp")
101 | out._backward = { [weak self, weak out] in
[6/7] Compiling SwiftGrad Losses.swift
[7/7] Compiling SwiftGrad NN.swift
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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: sha256:4aaa9704d9ec48004f0d4dbd1faa76d47dfce67570c934d5c9f7c1557cee5c73
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:android-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/6] Compiling SwiftGrad SwiftGrad.swift
[3/6] Compiling SwiftGrad NN.swift
[4/6] Emitting module SwiftGrad
[5/6] Compiling SwiftGrad Losses.swift
[6/6] Compiling SwiftGrad Engine.swift
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:77:17: error: cannot find 'Darwin' in scope
75 | /// Tanh activation
76 | public func tanh() -> Value {
77 | let t = Darwin.tanh(data)
| `- error: cannot find 'Darwin' in scope
78 | let out = Value(t, children: [self], op: "tanh")
79 | out._backward = { [weak self, weak out] in
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:89:25: error: cannot find 'Darwin' in scope
87 | public func log() -> Value {
88 | let base = data
89 | let out = Value(Darwin.log(data), children: [self], op: "log")
| `- error: cannot find 'Darwin' in scope
90 | out._backward = { [weak self, weak out] in
91 | guard let self, let out else { return }
/host/spi-builder-workspace/Sources/SwiftGrad/Engine.swift:99:17: error: cannot find 'Darwin' in scope
97 | /// Exponential: e^self
98 | public func exp() -> Value {
99 | let e = Darwin.exp(data)
| `- error: cannot find 'Darwin' in scope
100 | let out = Value(e, children: [self], op: "exp")
101 | out._backward = { [weak self, weak out] in
BUILD FAILURE 6.1 android