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


From: Richard Copley
Subject: Re: Emacs 25 hangs on windows arbitrarily during search of a unicode file
Date: Sat, 28 Oct 2017 12:05:28 +0100

On 19 October 2017 at 04:34, Eli Zaretskii <address@hidden> wrote:
>> From: C K Kashyap <address@hidden>
>> Date: Wed, 18 Oct 2017 18:18:20 -0700
>>
>> 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.

commit 68182a471007e4cb72efe53c38af9cb3aae332d2
Author: Eli Zaretskii <address@hidden>
Date:   Sat Oct 28 13:29:29 2017 +0300

git reset --hard origin/emacs-26
git clean -xfd
./autogen.sh
./configure --config-cache --with-modules --without-pop 'CFLAGS=-O1 -ggdb3'
make -j8 -Oline

See attached for the gdb session transcript.

Attachment: backtrace.txt
Description: Text document


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