+ ] + args + self.args
+ try:
+ return subprocess.Popen(cmd, env=self.env, stdout=subprocess.PIPE, stderr=NULL)
+ except OSError, ex:
+ sys.stderr.write('error: failed to execute %s: %s\n' % (cmd[0], ex.strerror))
+ sys.exit(1)
+
+ def retrace(self):
+ return self._retrace([