[PCH] Add a null check to avoid crashing.

Unfortunately, no test case. rdar://11960120

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163566 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Serialization/ASTReaderDecl.cpp b/lib/Serialization/ASTReaderDecl.cpp
index ba830d172c..7aac2ac3ed 100644
--- a/lib/Serialization/ASTReaderDecl.cpp
+++ b/lib/Serialization/ASTReaderDecl.cpp
@@ -590,8 +590,10 @@ void ASTDeclReader::VisitFunctionDecl(FunctionDecl *FD) {
                                                   TemplArgs.size(), C);
       void *InsertPos = 0;
       CanonTemplate->getSpecializations().FindNodeOrInsertPos(ID, InsertPos);
-      assert(InsertPos && "Another specialization already inserted!");
-      CanonTemplate->getSpecializations().InsertNode(FTInfo, InsertPos);
+      if (InsertPos)
+        CanonTemplate->getSpecializations().InsertNode(FTInfo, InsertPos);
+      else
+        assert(0 && "Another specialization already inserted!");
     }
     break;
   }