1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Bitcode/Reader/Deserialize.cpp b/lib/Bitcode/Reader/Deserialize.cpp
index febb2d7caf..d1d6ef098f 100644
--- a/lib/Bitcode/Reader/Deserialize.cpp
+++ b/lib/Bitcode/Reader/Deserialize.cpp
@@ -103,6 +103,11 @@ void Deserializer::RegisterPtr(unsigned PtrId,void* Ptr) {
 void Deserializer::ReadPtr(void*& PtrRef) {
   unsigned PtrId = ReadInt();
   
+  if (PtrId == 0) {
+    PtrRef = NULL;
+    return;
+  }  
+  
   BPatchEntry& E = BPatchMap[PtrId];
   
   if (E.Ptr == NULL) {