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use modify over getting a mutable reference

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Folkert 2022-05-20 21:01:50 +02:00
parent 8a361bb68a
commit 4489a308e4
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4 changed files with 27 additions and 27 deletions
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16
compiler/mono/src/copy.rs
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@ -391,14 +391,14 @@ fn deep_copy_type_vars<'a>(
// in one go (without looking at the UnificationTable) and clear the copy field
let mut result = Vec::with_capacity_in(copied.len(), arena);
for var in copied {
let descriptor = subs.get_ref_mut(var);
if let Some(copy) = descriptor.copy.into_variable() {
result.push((var, copy));
descriptor.copy = OptVariable::NONE;
} else {
debug_assert!(false, "{:?} marked as copied but it wasn't", var);
}
subs.modify(var, |descriptor| {
if let Some(copy) = descriptor.copy.into_variable() {
result.push((var, copy));
descriptor.copy = OptVariable::NONE;
} else {
debug_assert!(false, "{:?} marked as copied but it wasn't", var);
}
})
}
debug_assert!(result.contains(&(var, cloned_var)));