[generators] Always call function with closure context when resuming.

src/builtins/ia32/builtins-ia32.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.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 368 matching lines @@
 
   // Store input value into generator object.
   __ mov(FieldOperand(ebx, JSGeneratorObject::kInputOrDebugPosOffset), eax);
   __ RecordWriteField(ebx, JSGeneratorObject::kInputOrDebugPosOffset, eax, ecx,
                       kDontSaveFPRegs);
 
   // Store resume mode into generator object.
   __ mov(FieldOperand(ebx, JSGeneratorObject::kResumeModeOffset), edx);
 
   // Load suspended function and context.
-  __ mov(esi, FieldOperand(ebx, JSGeneratorObject::kContextOffset));
   __ mov(edi, FieldOperand(ebx, JSGeneratorObject::kFunctionOffset));
+  __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
 
   // Flood function if we are stepping.
   Label prepare_step_in_if_stepping, prepare_step_in_suspended_generator;
   Label stepping_prepared;
   ExternalReference debug_hook =
       ExternalReference::debug_hook_on_function_call_address(masm->isolate());
   __ cmpb(Operand::StaticVariable(debug_hook), Immediate(0));
   __ j(not_equal, &prepare_step_in_if_stepping);
 
   // Flood function if we need to continue stepping in the suspended generator.
@@ skipping 2698 matching lines @@
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32