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[Type checker] Don’t simplify to an error type.

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Type variables cannot be bound to error types, so don’t simplify to
them.
This commit is contained in:
Doug Gregor
2017-11-28 16:14:06 -08:00
parent 49326e08c5
commit d8fddee726
1 changed files with 1 additions and 1 deletions
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2
lib/Sema/ConstraintSystem.cpp
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@@ -1755,7 +1755,7 @@ Type simplifyTypeImpl(ConstraintSystem &cs, Type type, Fn getFixedTypeFn) {
assocType->getDeclContext()); assocType->getDeclContext());
auto result = assocType->getDeclaredInterfaceType().subst(subs); auto result = assocType->getDeclaredInterfaceType().subst(subs);
if (result) if (result && !result->hasError())
return result; return result;
} }