bug#45543: 26.3; Segmentation Fault on mu4e

[Eli Zaretskii]

> From: Partha Pratim Ghosh <ghosh.parthapratim.unisa@gmail.com>
> Date: Tue, 29 Dec 2020 23:10:10 +0200
> 
>                 Stack trace of thread 2111:
>                 #0  0x00007f9e06a6e24b raise (libpthread.so.0 + 0x1524b)
>                 #1  0x00000000004feb7d n/a (emacs-gtk + 0xfeb7d)
>                 #2  0x0000000000517874 n/a (emacs-gtk + 0x117874)
>                 #3  0x0000000000517aad n/a (emacs-gtk + 0x117aad)
>                 #4  0x0000000000517b2d n/a (emacs-gtk + 0x117b2d)
>                 #5  0x00007f9e06a6e3c0 __restore_rt (libpthread.so.0 + 
> 0x153c0)
>                 #6  0x00007f9e06c9e66d n/a (libotf.so.0 + 0xf66d)
>                 #7  0x00007f9e06c9fd1f n/a (libotf.so.0 + 0x10d1f)
>                 #8  0x00007f9e06ca1957 OTF_drive_gpos_with_log (libotf.so.0 + 
> 0x12957)
>                 #9  0x00000000005e2a4f n/a (emacs-gtk + 0x1e2a4f)
>                 #10 0x00007f9e06c54d07 n/a (libm17n-flt.so.0 + 0x2d07)
>                 #11 0x00007f9e06c5874f n/a (libm17n-flt.so.0 + 0x674f)
>                 #12 0x00007f9e06c5874f n/a (libm17n-flt.so.0 + 0x674f)
>                 #13 0x00007f9e06c580f7 n/a (libm17n-flt.so.0 + 0x60f7)
>                 #14 0x00007f9e06c5874f n/a (libm17n-flt.so.0 + 0x674f)
>                 #15 0x00007f9e06c59217 n/a (libm17n-flt.so.0 + 0x7217)

Looks like a crash in libotf and/or libm17n-flt, which we no longer
use in Emacs 27 and later.  Would it be possible for you to try Emacs
27.1 or the pretest of Emacs 27.2?