bug#15575: 24.3.50; New tty menus crash Emacs

[martin rudalics <rudalics@gmx.at>]

 >> (gdb) tty /dev/pts/3
 >
 > What is /dev/pts/3?  It should name an existing terminal.

It is an existing terminal where I did tty before ...

 >> (gdb) show inferior-tty
 >> Terminal for future runs of program being debugged is "/dev/pts/3".

... and the last line confirms it because it wouldn't say that if the
terminal did not exist.

 >> (gdb) run -Q -nw
 >> Starting program: /home/martin/emacs/trunk/src/bootstrap-emacs -Q -nw
 >> [Thread debugging using libthread_db enabled]
 >> Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
 >> [New Thread 0x7fffefd46700 (LWP 4629)]
 >> [Thread 0x7ffff7fcd960 (LWP 4626) exited]
 >> (gdb)
 >>
 >> ... and it still tells me that my terminal is dumb.
 >
 > Not sure why is dumb terminal relevant here.

That's what gdb told me.  Probably because I used -nw.

 > Anyway, AFAIK the way to do this is as follows:
 >
 >  gdb ./emacs
 >  (gdb) tty /dev/SOMETHING
 >  (gdb) r -Q -t /dev/SOMETHING
 >
 > (Not sure if -t /dev/SOMETHING is necessary.)
 >
 > But there seems to be some bug (or feature) in Emacs: it says "emacs:
 > Could not open file: /dev/tty" and quits.

Same here.

martin