Swift Package Index

Build Information

Failed to build SwiftRL, reference main (f08932), with Swift 6.3 for Wasm on 19 Apr 2026 04:49:13 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/SwiftAutograd/SwiftRL.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/SwiftRL
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at f089324 Fix flaky DQN GridWorld test
Cloned https://github.com/SwiftAutograd/SwiftRL.git
Revision (git rev-parse @):
f089324ca3a0ef514676d65e4fa45e03b43df3b3
SUCCESS checkout https://github.com/SwiftAutograd/SwiftRL.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/SwiftAutograd/SwiftRL.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d69f4e7582c319245442d62a08b2d7c7fd5a0c0c69f5d2ef11d1530cd8d3329b
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest
Fetching https://github.com/SwiftAutograd/SwiftGrad.git
[1/61] Fetching swiftgrad
Fetched https://github.com/SwiftAutograd/SwiftGrad.git from cache (2.64s)
Computing version for https://github.com/SwiftAutograd/SwiftGrad.git
Computed https://github.com/SwiftAutograd/SwiftGrad.git at 0.3.1 (3.00s)
Creating working copy for https://github.com/SwiftAutograd/SwiftGrad.git
Working copy of https://github.com/SwiftAutograd/SwiftGrad.git resolved at 0.3.1
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/8] Compiling SwiftGrad SwiftGrad.swift
[5/8] Compiling SwiftGrad NN.swift
[6/8] Emitting module SwiftGrad
[7/8] Compiling SwiftGrad Losses.swift
[8/8] Compiling SwiftGrad Engine.swift
/host/spi-builder-workspace/.build/checkouts/SwiftGrad/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/.build/checkouts/SwiftGrad/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/.build/checkouts/SwiftGrad/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 6.3 wasm