1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/Bitcode/Deserialize.h b/include/llvm/Bitcode/Deserialize.h
index f5adcffe25..164c70a9af 100644
--- a/include/llvm/Bitcode/Deserialize.h
+++ b/include/llvm/Bitcode/Deserialize.h
@@ -86,6 +86,10 @@ public:
   template <typename T>
   inline T* ReadOwnedPtr() {    
     unsigned PtrId = ReadInt();
+
+    if (PtrId == 0)
+      return NULL;
+    
     T* x = SerializeTrait<T>::Materialize(*this);
     RegisterPtr(PtrId,x);
     return x;