Display a meaningfull error message when trying to capture a stack trace to a proxy.

src/runtime/runtime-internal.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/ast/prettyprinter.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 245 matching lines @@
   return *isolate->factory()->NewFillerObject(size, double_align, space);
 }
 
 
 // Collect the raw data for a stack trace.  Returns an array of 4
 // element segments each containing a receiver, function, code and
 // native code offset.
 RUNTIME_FUNCTION(Runtime_CollectStackTrace) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, error_object, 0);
+  CONVERT_ARG_HANDLE_CHECKED(JSReceiver, error_object, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, caller, 1);
 
   if (!isolate->bootstrapper()->IsActive()) {
     // Optionally capture a more detailed stack trace for the message.
     RETURN_FAILURE_ON_EXCEPTION(
         isolate, isolate->CaptureAndSetDetailedStackTrace(error_object));
     // Capture a simple stack trace for the stack property.
     RETURN_FAILURE_ON_EXCEPTION(
         isolate, isolate->CaptureAndSetSimpleStackTrace(error_object, caller));
   }
@@ skipping 192 matching lines @@
   std::stringstream stats_stream;
   isolate->counters()->runtime_call_stats()->Print(stats_stream);
   Handle<String> result =
       isolate->factory()->NewStringFromAsciiChecked(stats_stream.str().c_str());
   isolate->counters()->runtime_call_stats()->Reset();
   return *result;
 }
 
 }  // namespace internal
 }  // namespace v8