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bootstrap: validate rust.codegen-backends & target.<triple>.codegen-backends #142212

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@GrigorenkoPV GrigorenkoPV commented Jun 8, 2025

As per #142184 (comment).

Closes #142184.

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rustbot commented Jun 8, 2025

r? @albertlarsan68

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@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) labels Jun 8, 2025
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rustbot commented Jun 8, 2025

This PR modifies src/bootstrap/src/core/config.

If appropriate, please update CONFIG_CHANGE_HISTORY in src/bootstrap/src/utils/change_tracker.rs.

Comment on lines +403 to +406
if !VALID_CODEGEN_BACKENDS.contains(&&**backend) {
let section = section();
panic!(
"Invalid value '{backend}' for '{section}.codegen-backends'. Permitted values: {VALID_CODEGEN_BACKENDS:?}."
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mh, I remember a PR deliberately introduce the fallthrough to the previous else if this condition fails to obtain? it was about using an out-of-tree codegen backend, I believe.

cc @FractalFir @WaffleLapkin

@workingjubilee workingjubilee changed the title bootstrap: validate rust.codegen-backends & targer.<triple>.codegen-backends bootstrap: validate rust.codegen-backends & target.<triple>.codegen-backends Jun 9, 2025
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Bootstrap ignores unknown values for codegen-backends
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