fix debug checks for api callbacks returning symbols

src/x64/macro-assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
@@ skipping 787 matching lines @@
 
 #if DEBUG
   // Check if the function returned a valid JavaScript value.
   Label ok;
   Register return_value = rax;
   Register map = rcx;
 
   JumpIfSmi(return_value, &ok, Label::kNear);
   movp(map, FieldOperand(return_value, HeapObject::kMapOffset));
 
-  CmpInstanceType(map, FIRST_NONSTRING_TYPE);
-  j(below, &ok, Label::kNear);
+  CmpInstanceType(map, LAST_NAME_TYPE);
+  j(below_equal, &ok, Label::kNear);
 
   CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE);
   j(above_equal, &ok, Label::kNear);
 
   CompareRoot(map, Heap::kHeapNumberMapRootIndex);
   j(equal, &ok, Label::kNear);
 
   CompareRoot(return_value, Heap::kUndefinedValueRootIndex);
   j(equal, &ok, Label::kNear);
 
@@ skipping 4583 matching lines @@
   if (mag.shift > 0) sarl(rdx, Immediate(mag.shift));
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64