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Richard Feldman 2019-12-07 00:40:57 -05:00
parent 23c1a5587a
commit bfacfa729b
1 changed files with 2 additions and 4 deletions
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src/solve.rs
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@ -58,10 +58,8 @@ pub fn solve(vars_by_symbol: &Env, subs: &mut Subs, constraint: &Constraint) {
let mut new_vars_by_symbol = vars_by_symbol.clone();
for (symbol, loc_type) in let_con.def_types.iter() {
// We must not overwrite existing symbols! If we do,
// we will overwrite procedure entries, which were
// inserted earlier in solving. (If we allowed
// shadowing, we'd need to do something fancier here.)
// No need to overwrite existing symbols; it would have no effect.
// (If we allowed shadowing, we'd need to do something fancier here.)
if !new_vars_by_symbol.contains_key(&symbol) {
let var = type_to_var(subs, loc_type.value.clone());