Properly handle parsing a '%'-prefixed runtime call as a binding pattern

src/preparser.h

 // 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.
 
 #ifndef V8_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/bailout-reason.h"
 #include "src/expression-classifier.h"
 #include "src/func-name-inferrer.h"
@@ skipping 2386 matching lines @@
     case Token::TEMPLATE_SPAN:
     case Token::TEMPLATE_TAIL:
       classifier->RecordBindingPatternError(
           scanner()->peek_location(),
           MessageTemplate::kUnexpectedTemplateString);
       return this->ParseTemplateLiteral(Traits::NoTemplateTag(), beg_pos,
                                         classifier, ok);
 
     case Token::MOD:
       if (allow_natives() || extension_ != NULL) {
+        BindingPatternUnexpectedToken(classifier);
         return this->ParseV8Intrinsic(ok);
       }
       break;
 
     case Token::DO:
       if (allow_harmony_do_expressions()) {
         BindingPatternUnexpectedToken(classifier);
         return Traits::ParseDoExpression(ok);
       }
       break;
@@ skipping 1781 matching lines @@
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PREPARSER_H