Swift Package Index

Build Information

Failed to build Uncertain, reference main (962d4c), with Swift 6.0 for macOS (SPM) on 28 Aug 2025 15:18:19 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.67.1
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/mattt/Uncertain.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mattt/Uncertain
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 962d4cc Add link to NSHipster blog post (#11)
Cloned https://github.com/mattt/Uncertain.git
Revision (git rev-parse @):
962d4cc802a2b179685d33919cb02588218d063e
SUCCESS checkout https://github.com/mattt/Uncertain.git at main
========================================
Build
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Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/mattt/Uncertain.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-5BDAB9E9C0126B9D.txt
[3/4] Emitting module Uncertain
[4/4] Compiling Uncertain Uncertain.swift
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:118:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 116 |             left: lhs.node,
 117 |             threshold: rhs,
 118 |             comparison: ==
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 119 |         )
 120 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:132:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 130 |             left: lhs.node,
 131 |             threshold: rhs,
 132 |             comparison: !=
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 133 |         )
 134 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:163:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 161 |             left: lhs.node,
 162 |             threshold: rhs,
 163 |             comparison: >
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 164 |         )
 165 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:177:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 175 |             left: lhs.node,
 176 |             threshold: rhs,
 177 |             comparison: <
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 178 |         )
 179 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:191:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 189 |             left: lhs.node,
 190 |             threshold: rhs,
 191 |             comparison: >=
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 192 |         )
 193 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:205:25: error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 203 |             left: lhs.node,
 204 |             threshold: rhs,
 205 |             comparison: <=
     |                         `- error: converting non-sendable function value to '@Sendable (T, T) -> Bool' may introduce data races
 206 |         )
 207 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:235:24: error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 233 |             left: lhs.node,
 234 |             right: rhs.node,
 235 |             operation: +
     |                        `- error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 236 |         )
 237 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:249:24: error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 247 |             left: lhs.node,
 248 |             right: rhs.node,
 249 |             operation: -
     |                        `- error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 250 |         )
 251 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:263:24: error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 261 |             left: lhs.node,
 262 |             right: rhs.node,
 263 |             operation: *
     |                        `- error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 264 |         )
 265 |
/Users/admin/builder/spi-builder-workspace/Sources/Uncertain/Uncertain.swift:337:24: error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 335 |             left: lhs.node,
 336 |             right: rhs.node,
 337 |             operation: /
     |                        `- error: converting non-sendable function value to '@Sendable (T, T) -> T' may introduce data races
 338 |         )
 339 |
BUILD FAILURE 6.0 macosSpm