CodeGenModule.cpp: [PR33810][Modules] Make sure actual memory corruption before random crash with -fmodules.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309499 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index d616486f17..63d5ff3bee 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -745,6 +745,8 @@ StringRef CodeGenModule::getMangledName(GlobalDecl GD) {
 
   // Keep the first result in the case of a mangling collision.
   auto Result = Manglings.insert(std::make_pair(Str, GD));
+  assert(&FoundStr == &MangledDeclNames[CanonicalGD] && "FoundStr is invalidated!");
+  assert(FoundStr.empty() && "FoundStr is not empty!");
   return FoundStr = Result.first->first();
 }