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Fix non-determinism in the order of with remappings #1737

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Merged
alexcrichton merged 1 commit into from
Oct 6, 2026
Merged

Fix non-determinism in the order of with remappings #1737

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9 changes: 8 additions & 1 deletion crates/guest-rust/macro/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -153,7 +153,14 @@ impl Parse for Config {
Opt::AdditionalMemberAttributes(list) => {
opts.additional_member_attributes = list
}
Opt::With(with) => opts.with.extend(with),
Opt::With(with) => {
// `HashMap` iteration order is non-deterministic, which can cause
// non-determinism in crates that invoke the macro. Sort by key so the
// output is stable.
let mut with: Vec<_> = with.into_iter().collect();
with.sort_by(|a, b| a.0.cmp(&b.0));
opts.with.extend(with)
}
Opt::GenerateAll => {
opts.generate_all = true;
}
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