[ci] workaround MSVC 14.51 coroutine hard-error in flutter-app test

[lei9444]

Description

Usage Example

Related Issue

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 💥 Breaking change
• 📝 Documentation
• 🔧 Config/build
• ♻️ Refactoring
• 🧪 Test update

Checklist

• New tests added for new functionality (if applicable)
• Tested locally on Windows
• Main README.md updated (if applicable)
• docs/usage.md updated (if CLI commands changed)
• Language-specific guides updated (if applicable)
• Sample projects updated to reflect changes (if applicable)
• Agent skill templates updated in docs/fragments/skills/ (if CLI commands/workflows changed)

Screenshots / Demo

Additional Notes

AI Description

This pull request modifies the PowerShell test script for the Flutter app sample to address a hard error encountered with MSVC 14.51 related to ``. A workaround is implemented by temporarily modifying the CMake configuration to suppress deprecation warnings during the build process.

# MSVC 14.51+ hard-errors on ; suppress until Flutter updates its runner.
$cmakeFile = Join-Path $script:projectDir "windows\runner\CMakeLists.txt"
if (Test-Path $cmakeFile) {
    $content = Get-Content $cmakeFile -Raw
    if ($content -notlike '*_SILENCE_EXPERIMENTAL_COROUTINE*') {
        $content = $content -replace '(target_compile_definitions\(\$\{BINARY_NAME\} PRIVATE[^)]*)', "`$1`n  _SILENCE_EXPERIMENTAL_COROUTINE_DEPRECATION_WARNINGS"
        Set-Content $cmakeFile $content -NoNewline
    }
}

[Copilot]

Pull request overview

This PR updates the Flutter sample’s Pester test to work around an MSVC 14.51+ coroutine deprecation hard-error by injecting _SILENCE_EXPERIMENTAL_COROUTINE_DEPRECATION_WARNINGS into the Windows runner CMake configuration before building.

Changes:

• Patch windows/runner/CMakeLists.txt during Phase 1 (temp project) before flutter build windows.
• Patch windows/runner/CMakeLists.txt during Phase 2 (checked-in sample) before flutter build windows.

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[github-actions]

Build Metrics Report

Binary Sizes

Artifact	Baseline	Current	Delta
CLI (ARM64)	31.49 MB	31.49 MB	✅ 0.0 KB (0.00%)
CLI (x64)	31.82 MB	31.82 MB	✅ 0.0 KB (0.00%)
MSIX (ARM64)	13.23 MB	13.23 MB	📈 +0.2 KB (+0.00%)
MSIX (x64)	14.05 MB	14.05 MB	📉 -0.0 KB (-0.00%)
NPM Package	27.52 MB	27.52 MB	📈 +0.2 KB (+0.00%)
NuGet Package	27.62 MB	27.62 MB	📈 +0.2 KB (+0.00%)
VS Code Extension	20.34 MB	20.34 MB	📈 +0.7 KB (+0.00%)

Test Results

✅ 1198 passed, 1 skipped out of 1199 tests in 452.6s (+29.7s vs. baseline)

Test Coverage

❌ 17.3% line coverage, 36.3% branch coverage · ✅ no change vs. baseline

CLI Startup Time

43ms median (x64, winapp --version) · ✅ no change vs. baseline

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Updated 2026-06-16 19:54:49 UTC · commit d4d9942 · workflow run