Checking patch sysdeps/mach/hurd/i386/sigreturn.c...
error: while searching for:
     reply port in use by the thread when interrupted.  */
  reply_port = THREAD_GETMEM (THREAD_SELF, reply_port);
  THREAD_SETMEM (THREAD_SELF, reply_port, scp->sc_reply_port);
  __mach_port_mod_refs (__mach_task_self (), reply_port,
                        MACH_PORT_RIGHT_RECEIVE, -1);

  if (scp->sc_fpused)
    /* Restore the FPU state.  Mach conveniently stores the state

error: patch failed: sysdeps/mach/hurd/i386/sigreturn.c:102
Applying patch sysdeps/mach/hurd/i386/sigreturn.c with 1 reject...
Rejected hunk #1.