Bug in StoreIC::GenerateMegamorphic: strict_mode/extra_ic_state mismatch.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index bc6dcebd36187832f85cfea57f31311d0a2ba89d..f9c2708ba12d2ca17e49fefdc21a3fc9cecf7f99 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1412,12 +1412,14 @@ static void Generate_StoreIC_Normal(MacroAssembler* masm) {
 
 
 static void Generate_StoreIC_Megamorphic(MacroAssembler* masm) {
-  StoreIC::GenerateMegamorphic(masm, kNonStrictMode);
+  StoreIC::GenerateMegamorphic(masm,
+                               StoreIC::ComputeExtraICState(kNonStrictMode));
 }
 
 
 static void Generate_StoreIC_Megamorphic_Strict(MacroAssembler* masm) {
-  StoreIC::GenerateMegamorphic(masm, kStrictMode);
+  StoreIC::GenerateMegamorphic(masm,
+                               StoreIC::ComputeExtraICState(kStrictMode));
 }