[debugger] omit exception events for rethrown exceptions in async.

src/parsing/parser-base.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_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/base/hashmap.h"
@@ skipping 2455 matching lines @@
     }
   }
 
   if (delegating) {
     return Traits::RewriteYieldStar(generator_object, expression, pos);
   }
 
   expression = Traits::BuildIteratorResult(expression, false);
   // Hackily disambiguate o from o.next and o [Symbol.iterator]().
   // TODO(verwaest): Come up with a better solution.
-  typename Traits::Type::YieldExpression yield =
-      factory()->NewYield(generator_object, expression, pos);
+  typename Traits::Type::YieldExpression yield = factory()->NewYield(
+      generator_object, expression, pos, Yield::kOnExceptionThrow);
   return yield;
 }
 
 template <class Traits>
 typename ParserBase<Traits>::ExpressionT
 ParserBase<Traits>::ParseTailCallExpression(ExpressionClassifier* classifier,
                                             bool* ok) {
   // TailCallExpression::
   //   'continue' MemberExpression  Arguments
   //   'continue' CallExpression  Arguments
@@ skipping 1163 matching lines @@
     has_seen_constructor_ = true;
     return;
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H