bug#26932: 25.1; Crash triggered a few times a day with network process

[Eli Zaretskii]

> Date: Tue, 13 Jun 2017 16:41:37 +0100 (BST)
> From: Vivek Dasmohapatra <vivek@etla.org>
> cc: 26932@debbugs.gnu.org
> 
> Triggered the segfault: Looks different to the emacs 25.1 fault
> but still GC related, I think.
> 
> gdb session remains up and running.

What kind of :eval form(s) do you have in your mode-line-format
definitions?