Swift Package Index

Build Information

Failed to build SwiftGrad, reference main (55fd4d), with Swift 6.2 for Linux on 17 Mar 2026 01:36:22 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/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:basic-6.2-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build 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:         linux
Swift version:             6.2
Building package at path:  $PWD
https://github.com/SwiftAutograd/SwiftGrad.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:basic-6.2-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.2-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d2f920c74e2de776c2ba4e297b2280b61148e6eb762436a4aad45f2a95167cea
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:basic-6.2-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
BUILD FAILURE 6.2 linux