bug#39207: WITH dgb symbols Re: bug#39207: 28.0.50; crash when sending gnus message

[Eli Zaretskii]

> From: gijs@hillenius.net (Gijs Hillenius)
> Date: Tue, 21 Jan 2020 12:08:45 +0100
> 
> Thread 1 "emacs-snapshot-" received signal SIGUSR2, User defined signal 2.
> display_count_lines (start_byte=3457, start_byte@entry=2897, limit_byte=3462, 
> count=3404, byte_pos_ptr=byte_pos_ptr@entry=0x7fffffff81c0) at xdisp.c:26516

This is not a crash, this is an interrupt by the SIGUSR2 signal.  Your
original report shows Abort, which is SIGABRT, a much more serious
problem.