1 files changed, 2 insertions, 0 deletions
diff --git a/src/jit/gentree.h b/src/jit/gentree.h
index 05a3a4a070..b5390f3841 100644
--- a/src/jit/gentree.h
+++ b/src/jit/gentree.h
@@ -4258,6 +4258,8 @@ public:
     GenTreeDynBlk(GenTreePtr addr, GenTreePtr dynamicSize)
         : GenTreeBlk(GT_DYN_BLK, TYP_STRUCT, addr, 0), gtDynamicSize(dynamicSize), gtEvalSizeFirst(false)
     {
+        // Conservatively the 'addr' could be null or point into the global heap.
+        gtFlags |= GTF_EXCEPT | GTF_GLOB_REF;
         gtFlags |= (dynamicSize->gtFlags & GTF_ALL_EFFECT);
     }