Swift Package IndexBuild Information
Failed to build SwiftRL, reference main (f08932), with Swift 6.1 for Linux on 16 Mar 2026 10:06:00 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1Build Log
========================================
RunAll
========================================
Builder version: 4.69.1
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: linux
Swift version: 6.1
Building package at path: $PWD
https://github.com/SwiftAutograd/SwiftRL.git
https://github.com/SwiftAutograd/SwiftRL.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
"dependencies" : [
{
"identity" : "swiftgrad",
"requirement" : {
"range" : [
{
"lower_bound" : "0.3.1",
"upper_bound" : "1.0.0"
}
]
},
"type" : "sourceControl",
"url" : "https://github.com/SwiftAutograd/SwiftGrad.git"
}
],
"manifest_display_name" : "SwiftRL",
"name" : "SwiftRL",
"path" : "/host/spi-builder-workspace",
"platforms" : [
],
"products" : [
{
"name" : "SwiftRL",
"targets" : [
"SwiftRL"
],
"type" : {
"library" : [
"automatic"
]
}
}
],
"targets" : [
{
"c99name" : "SwiftRLTests",
"module_type" : "SwiftTarget",
"name" : "SwiftRLTests",
"path" : "Tests/SwiftRLTests",
"sources" : [
"SwiftRLTests.swift"
],
"target_dependencies" : [
"SwiftRL"
],
"type" : "test"
},
{
"c99name" : "SwiftRL",
"module_type" : "SwiftTarget",
"name" : "SwiftRL",
"path" : "Sources/SwiftRL",
"product_dependencies" : [
"SwiftGrad"
],
"product_memberships" : [
"SwiftRL"
],
"sources" : [
"Algorithms/DQN.swift",
"Algorithms/REINFORCE.swift",
"Core/Agent.swift",
"Core/Environment.swift",
"Core/ReplayBuffer.swift",
"Environments/Bandit.swift",
"Environments/CartPole.swift",
"Environments/GridWorld.swift",
"Environments/Snake.swift",
"Math/Softmax.swift",
"Optimizers/Adam.swift",
"SwiftRL.swift",
"Utilities/EpsilonSchedule.swift",
"Utilities/RewardTracker.swift"
],
"type" : "library"
}
],
"tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats 2>&1
basic-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:7e70e0a64d2f2fbcaf7a9ded92418bf54647123e95b9450d840f38f11e93f5d2
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:basic-6.1-latest
Fetching https://github.com/SwiftAutograd/SwiftGrad.git
[1/61] Fetching swiftgrad
Fetched https://github.com/SwiftAutograd/SwiftGrad.git from cache (2.58s)
Computing version for https://github.com/SwiftAutograd/SwiftGrad.git
Computed https://github.com/SwiftAutograd/SwiftGrad.git at 0.3.1 (3.12s)
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 Losses.swift
[5/8] Compiling SwiftGrad SwiftGrad.swift
[6/8] Compiling SwiftGrad NN.swift
[7/8] Emitting module SwiftGrad
[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
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.1-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:7e70e0a64d2f2fbcaf7a9ded92418bf54647123e95b9450d840f38f11e93f5d2
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:basic-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] Emitting module SwiftGrad
[4/6] Compiling SwiftGrad Losses.swift
[5/6] Compiling SwiftGrad NN.swift
[6/6] 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 6.1 linux