Send an empty/error reply when the debugger fails.

[lum1n0us]

Here if we directly return without any response, the debugger client will wait forever. A better way may be sending an empty/error reply (like write_packet(server, ""); or write_packet(server, "E01");) to tell the server there is an error.

https://sourceware.org/gdb/current/onlinedocs/gdb.html/Standard-Replies.html#Standard-Replies

Originally posted by @xujuntwt95329 in #4234 (comment)