bug#27024: 25.2: gud.el: wrong menu :visible for pdb

[Eli Zaretskii <eliz@gnu.org>]

> From: "Charles A. Roelli" <charles@aurox.ch>
> Date: Mon, 22 May 2017 20:33:26 +0200
> 
> The "stop" entry in `gud-menu-map' (line 158):
> 
>      ([stop]	menu-item "Stop" gud-stop-subjob
> 		  :visible (or (not (memq gud-minor-mode '(gdbmi pdb)))
> 			       (gdb-show-stop-p)))
> 
> has a :visible entry that calls `gdb-show-stop-p' if `gud-minor-mode' is 
> either
> `gdbmi' or `pdb'.  This function is only related to gdb and isn't loaded 
> by running
> just pdb, so it can cause an error during redisplay (but interestingly,
> it doesn't seem to happen all the time while running pdb -- or maybe the 
> error is
> caught somehow).
> 
> Does anyone understand why this check for pdb is here?  It seems to be a 
> mistake,
> but it has been there for more than 7 years...
> 
> Otherwise, could someone please remove the check for pdb?  Thanks.

Thanks, I've modified the test to not call gdb-show-stop-p in pdb
mode.