--- a/js/src/jit/FlowAliasAnalysis.cpp
+++ b/js/src/jit/FlowAliasAnalysis.cpp
@@ -75,17 +75,18 @@ class GraphStoreInfo : public TempObject
     // Only keeping the info during iteration if needed, else contains nullptr.
     GraphStoreVector stores_;
 
     // All BlockStoreInfo's that aren't needed anymore and can be reused.
     GraphStoreVector empty_;
 
   public:
     explicit GraphStoreInfo(TempAllocator& alloc)
-      : stores_(alloc),
+      : current_(nullptr),
+        stores_(alloc),
         empty_(alloc)
     { }
 
     bool reserve(size_t num) {
         return stores_.appendN(nullptr, num);
     }
 
     BlockStoreInfo& current() {