Comment 3 for bug 1217213

OK, this is an upstream issue that is only now more visible because the utility user functionality create a path that may be hit more often via user error. That path is basically any false exit from sql/sql_acl.cc:acl_load after init_read_record has been called.

I injected:
  return_val= FALSE;
  goto end:
 in several placed along acl_reload and everything operated normally until I reached init_read_record, once I return with an error after that, the server will always assert in the same way. I verified this on MySQL 5.5.33 debug.