> https://sourceware.org/gdb/onlinedocs/gdb/Forks.html
> 
> this might help here.

Thanks Gábor.
So I tried the following in gdb:

> set follow-for-mode child
> set detach-on-fork off
> run emacs
[inferior 2 completes]
> inferior 1
[inferior 3 completes]
> inferior 1
[inferior 4 completes]
> inferior 1
[inferior 5 hangs]

GDB seems to be stuck on the 5th inferior.  Maybe this is not so reliable.

> Can we trigger the segfault without libpipeline?

"preconv" by itself seems to work perfectly.  It even works in man if it's in
the PATH.  It only breaks from libpipeline.

-- 
Pierre Neidhardt
https://ambrevar.xyz/