bug#70014: 29.2; debugging with gdb problem with input/output buffer

[Richard Stallman]

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  > This feature doesn't work on MS-Windows because the underlying GDB
  > feature (set inferior-tty) doesn't.  If someone knows how to fix that,
  > patches are very welcome, but they are are probably need to be
  > submitted to GDB, not to Emacs.

Emacs should at least five a clear error message.
That it can do without changes in GDB.  For users to know
that this usage is unsupported in GDB would be a big help.

I would guess that there are fundamental reasons it is not supported

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)