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Compiler option precedence: Optimization options survive twice · case 05

Optimization options survive twice.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Append defaults, replace optimization options by the last requested optimization, preserve repeated include options, remove explicitly disabled warnings, and append mandatory flags exactly once.

Why this case matters

An offline model of compiler option precedence, suitable for testing build and release tooling without external services.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
fixture 2	`["-Ifoo", "-Ifoo", "-g"]`	`["-Ifoo", "-Ifoo", "-O2", "-g"]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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