[es6] Correct parsing of regular expression literal flags.

test/unittests/interpreter/bytecode-array-builder-unittest.cc

 // Copyright 2014 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"
 
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 #include "test/unittests/test-utils.h"
 
@@ skipping 83 matching lines @@
       .StoreKeyedProperty(reg, reg, 2056, LanguageMode::STRICT);
 
   // Emit closure operations.
   builder.CreateClosure(NOT_TENURED);
 
   // Emit argument creation operations.
   builder.CreateArguments(CreateArgumentsType::kMappedArguments)
       .CreateArguments(CreateArgumentsType::kUnmappedArguments);
 
   // Emit literal creation operations
-  builder.CreateRegExpLiteral(0, reg)
+  builder.CreateRegExpLiteral(0, 0)
       .CreateArrayLiteral(0, 0)
       .CreateObjectLiteral(0, 0);
 
   // Call operations.
   builder.Call(reg, reg, 0, 0)
       .Call(reg, reg, 0, 1024)
       .CallRuntime(Runtime::kIsArray, reg, 1)
       .CallJSRuntime(Context::SPREAD_ITERABLE_INDEX, reg, 1);
 
   // Emit binary operator invocations.
@@ skipping 591 matching lines @@
 
   CHECK_EQ(iterator.current_bytecode(), Bytecode::kReturn);
   iterator.Advance();
   CHECK(iterator.done());
 }
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8