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Re: bison segv under Cygwin 64 at fatal-signal.c:318

From: Brian Inglis
Subject: Re: bison segv under Cygwin 64 at fatal-signal.c:318
Date: Thu, 16 Sep 2021 08:30:37 -0600
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0

On 2021-09-16 04:44, Bruno Haible wrote:
He also run gnulib's test suite, with results attached below
(taken from https://lists.gnu.org/r/bug-bison/2021-09/msg00031.html).

Well, when I build the same tarball on Cygwin 2.9.0 64-bit, I get
much better results (10 failures, not 43 failures).

Hi Bruno,

Please note that latest bison built and passed all checks on latest Cygwin 32.
The issue is only with Cygwin 64.
I consistently reproduced the SEGV @ 0x0000000100000000 with trashed stack, in a gdb script. I reproduced the same results in both environments with bison 3.8/3.8.1 and gcc 10.2.0/11.2.0, to eliminate other possible concerns, over a few days, before asking for help on bug-bison!

How did you build that package?

I built using latest Cygwin 3.2.0 with gcc 10.2.0 and ~150 Cygwin
...-devel packages available, using cygport --debug for logging, but otherwise default package build with autoreconf, configure, make, check, same as Cygwin 32 bison.

I am currently rebuilding using just straight

        $ configure --disable-silent-rules && make && make check

into a parallel dummy-build dir (with logs), to hopefully get more diagnostically useful check logs.

I will also redo cygport with --disable-silent-rules after those builds and checks complete (in a few hours).

Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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