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Add a warning when running tests with the GCC backend and debug assertions are enabled #147625

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Merged
merged 1 commit into from
Oct 13, 2025
Merged

Add a warning when running tests with the GCC backend and debug assertions are enabled #147625

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11 changes: 11 additions & 0 deletions src/bootstrap/src/core/build_steps/test.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1942,6 +1942,17 @@ HELP: You can add it into `bootstrap.toml` in `rust.codegen-backends = [{name:?}
);
crate::exit!(1);
}

if let CodegenBackendKind::Gcc = codegen_backend
&& builder.config.rustc_debug_assertions
{
eprintln!(
r#"WARNING: Running tests with the GCC codegen backend while rustc debug assertions are enabled. This might lead to test failures.
Please disable assertions with `rust.debug-assertions = false`.
"#
);
}

// Tells compiletest that we want to use this codegen in particular and to override
// the default one.
cmd.arg("--override-codegen-backend").arg(codegen_backend.name());
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