bug#56527: 28.1; Crash on macOS with magit

[Eli Zaretskii]

> From: Jonathan Mitchell <mitchell.jkyle@gmail.com>
> Date: Thu, 14 Jul 2022 10:21:37 -0500
> Cc: 56527@debbugs.gnu.org
> 
> This time it failed at another assertion:
> "insdel.c:295: Emacs fatal error: assertion failed: m->bytepos >= m->charpos 
> && m->bytepos - m->charpos
> <= Z_BYTE - Z"
> 
> New debug backtrace is attached.

Thanks, but you didn't show the offending values: those in the
assertion.  Can you show them?