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Deduplicate capture niches

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ayazhafiz 2022-07-02 19:04:23 -04:00
parent 91050d9989
commit 3385c708c6
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5
crates/compiler/mono/src/layout.rs
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@ -1009,6 +1009,11 @@ impl<'a> LambdaSet<'a> {
joined.sort_by(|(lam_and_captures1, _), (lam_and_captures2, _)| {
lam_and_captures1.cmp(lam_and_captures2)
});
// Remove duplicate lambda captures layouts unification can't see as
// duplicates, for example [[Thunk {a: Str}, Thunk [A Str]]], each of which are
// newtypes over the lambda layout `Thunk Str`.
joined.dedup_by_key(|((name, captures), _)| (*name, *captures));
let (set, set_with_variables): (std::vec::Vec<_>, std::vec::Vec<_>) =
joined.into_iter().unzip();