Re: Emacs 25 hangs on windows arbitrarily during search of a unicode file

[Eli Zaretskii <eliz@gnu.org>]

> From: Richard Copley <rcopley@gmail.com>
> Date: Sat, 28 Oct 2017 12:05:28 +0100
> Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
> 
> >> If I just open the attached file (it's a unicode file) and do nothing but
> >> C-g C-s a few times quickly, I run into the hang.
> >>
> >> I'd appreciate it very much if someone could let me know how I could avoid
> >> this hang or dig out more information.
> >
> > I can see it in Emacs 25.2, but not in the pretest of what will become
> > Emacs 26.1.  So one thing you could do is install that pretest, it's
> > available from alpha.gnu.org.
> 
> I don't see a hang, I see an immediate segfault. I build emacs-26 myself.
> The recipe from "emacs -Q servicelistpage.txt":
>     Type C-g.
> 
> The crash occurs at -O1 and -O3. It does not occur at -O0. Attached is
> a gdb backtrace (at -O1 -ggdb3). This is built with the 64-bit mingw-w64
> toolchain from MSYS2, up to date as of now, from the fsf emacs-26
> branch, with no local patches.

I have 26.0.90 compiled with -Og, and it is not reproducible on my
system.  Maybe it's something specific to the 64-bit build?  My builds
are 32-bit.