[es6] When comparing two symbols we may need to throw a TypeError

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 90e3672a91d8315adb4074d3c2049c9dfa74a8fa..379c1c8bf277a6e86860d6ff659ea7f6470ded5d 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -1710,6 +1710,9 @@ void CompareICStub::GenerateGeneric(MacroAssembler* masm) {
       // Call runtime on identical JSObjects.  Otherwise return equal.
       __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
       __ j(above_equal, &not_identical);
+      // Call runtime on identical symbols since we need to throw a TypeError.
+      __ CmpObjectType(eax, SYMBOL_TYPE, ecx);
+      __ j(equal, &not_identical);
     }
     __ Move(eax, Immediate(Smi::FromInt(EQUAL)));
     __ ret(0);