[Bug cli/28833] Ctrl-D distorts GDB prompt

["aburgess at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28833

--- Comment #5 from Andrew Burgess <aburgess at redhat dot com> ---
Thanks for the pointers Bruno.  I did manage to reproduce this in the end, used
script to grab the output of gdb, including any escape sequences, and now
understand why I couldn't reproduce this.

Summary: I had 'set enable-bracketed-paste off' in my ~/.xinputrc file.  With
this in place, the problem goes away (not proposing this as a solution, just
giving all the details).

With 'set enable-bracketed-paste on' I can reproduce the problem on my local
machine.

So, when this goes "right", all I see from GDB is:

  (gdb) quit

with no additional escape sequences.

However, with enable-bracketed-paste in on, I now see this:

  \033[?2004h(gdb) \033[?2004l\rquit

Now the '\033[?2004h' and '\033[?2004l' are, I guess, expected. These are the
bracketed paste markers.  However, notice after the second sequence there is a
sneaky \r.  This is what sends the 'quit' to the start of the line and causes
the corruption.

I'm going to try and figure out where the \r is coming from.

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