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Freshly instantiate nested recursion variables under an opaque type

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Ayaz Hafiz 2023-04-12 14:31:19 -05:00
parent 3d6353dbd2
commit d3ab9ab926
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3 changed files with 24 additions and 15 deletions
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crates/compiler/types/src/types.rs
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@ -2316,7 +2316,7 @@ impl Type {
RecursiveTagUnion(rec, tags, ext) => {
if let Some(replacement) = substitutions.get(rec) {
let new_rec_var = match replacement {
Type::Variable(v) => v.clone(),
Type::Variable(v) => *v,
_ => panic!("Recursion var substitution must be a variable"),
};