[interpreter] Fix source position of yield-exceptions in generators.

src/interpreter/bytecode-generator.cc

 // Copyright 2015 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/interpreter/bytecode-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 200 matching lines @@
   explicit ControlScopeForTopLevel(BytecodeGenerator* generator)
       : ControlScope(generator) {}
 
  protected:
   bool Execute(Command command, Statement* statement) override {
     switch (command) {
       case CMD_BREAK:  // We should never see break/continue in top-level.
       case CMD_CONTINUE:
         UNREACHABLE();
       case CMD_RETURN:
+        generator()->builder()->SetReturnPosition();
         generator()->builder()->Return();
         return true;
       case CMD_RETHROW:
         generator()->builder()->ReThrow();
         return true;
     }
     return false;
   }
 };
 
@@ skipping 3043 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->shared_info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8