Preserve error message during finally block in try..finally.

src/full-codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1269 matching lines @@
   Label try_entry, handler_entry, finally_entry;
 
   // Jump to try-handler setup and try-block code.
   __ jmp(&try_entry);
   __ bind(&handler_entry);
   handler_table()->set(stmt->index(), Smi::FromInt(handler_entry.pos()));
   // Exception handler code.  This code is only executed when an exception
   // is thrown.  The exception is in the result register, and must be
   // preserved by the finally block.  Call the finally block and then
   // rethrow the exception if it returns.
+  // Preserve the pending message corresponding to the thrown error when
+  // executing the finally block.
+  SavePendingMessage();
   __ Call(&finally_entry);
+  RestorePendingMessage();
   __ push(result_register());
   __ CallRuntime(Runtime::kReThrow, 1);
 
   // Finally block implementation.
   __ bind(&finally_entry);
   EnterFinallyBlock();
   { Finally finally_body(this);
     Visit(stmt->finally_block());
   }
   ExitFinallyBlock();  // Return to the calling code.
@@ skipping 122 matching lines @@
   }
 
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal