Start using Dart_PropagateError in the runtime/bin directory.

runtime/bin/test_extension_linux.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <string.h>
 
 #include "../include/dart_api.h"
 
 #define EXPORT_SYMBOL __attribute__ ((visibility ("default")))
 
@@ skipping 14 matching lines @@
     Dart_SetReturnValue(arguments, object);
   }
 }
 
 extern "C" Dart_NativeFunction ResolveName(Dart_Handle name, int argc) {
   assert(Dart_IsString8(name));
   const char* cname;
   Dart_Handle check_error;
 
   check_error = Dart_StringToCString(name, &cname);
-  if (Dart_IsError(check_error)) return NULL;
+  if (Dart_IsError(check_error)) {
+    Dart_PropateError(check_error);
+  }
   if (!strcmp("Cat_IfNull", cname) && argc == 2) {
     return IfNull;
   }
   return NULL;
 }