bug#44047: current HEAD has been crashing on startup

[Liam Stitt]

I waited a few days before reporting this because I'm not sure how much 
useful information I can provide in this report, but it hasn't been 
mentioned by anyone else, so here goes.

Running ./emacs in src/ within gdb (invoking it with -Q), I'm getting:

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.

build_frame_matrix_from_leaf_window (w=0x555555b8c140,
    frame_matrix=<optimized out>) at dispnew.c:2531
2531          fill_up_frame_row_with_spaces (frame_row, 
window_matrix->matrix_x);

This is on a Linux 5.7 kernel, Debian unstable, x86-64, but I can 
replicate it on a raspi running 5.4 and stable.

It appears to be related to -nw somehow; using that triggers the crash on 
the Pi (otherwise it starts up normally).

On the first machine, configure options are "--with-x-toolkit=no 
--without-x --with-mailutils --enable-link-time-optimization".

I'm sorry I can't be more detailed, but it's kind of hard to run M-x
report-emacs-bug under the circumstances. I can, of course, test any 
patches.


--
Liam Stitt
stittl@cuug.ab.ca