gdb多窗口下有多个gud窗口且自定义后仍无法解决

[zzydashuaibi]

同时它提示我一下三个问题，我网上查了半天没有相关的答复，我是emacs 26的 error in process filter: Wrong type argument: stringp, nil [2 times] WARNING! Discarding GDB handler with token #6

user-error: Minibuffer window is not active