Properly clear current coroutine promise on FunctionScopeInfo reuse. Should

hopefully make bots happy again.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@251397 91177308-0d34-0410-b5e6-96231b3b80d8

Author: zygoloid

Diff for: lib/Sema/ScopeInfo.cpp

@@ -39,6 +39,7 @@ void FunctionScopeInfo::Clear() {
 
   SwitchStack.clear();
   Returns.clear();
+  CoroutinePromise = nullptr;
   CoroutineStmts.clear();
   ErrorTrap.reset();
   PossiblyUnreachableDiags.clear();