From: "William M. (Mike) Miller" <william.m.miller@gmail.com>
To: The Cygwin Mailing List <cygwin@cygwin.com>
Subject: Re: Failed assertion dialog box
Date: Fri, 13 Nov 2020 23:21:12 -0500 [thread overview]
Message-ID: <CAH5rLZV+T7u_u6TgivKA7y2RmBJiySVuUsxPVJQjLsEYoN91_A@mail.gmail.com> (raw)
In-Reply-To: <20201114034504.GD2905@dimstar.local.net>
On Fri, Nov 13, 2020 at 10:45 PM Duncan Roe <duncan_roe@optusnet.com.au>
wrote:
> Hi William,
>
> On Fri, Nov 13, 2020 at 12:27:57PM -0500, cygwin wrote:
> > I've run into a problem running a collection of tests under Cygwin and I
> > wonder if anyone can suggest a way around it.
> >
> > The problem occurs when a program being run fails a C/C++ runtime
> > assertion. Ordinarily, this just writes an error message on stderr and
> > aborts. Under Cygwin, however, if both stdin and stderr are redirected to
> > files, the program instead pops up a dialog box that must be
> interactively
> > dismissed before the failed program will exit - holding up all the tests
> > that follow it.
> >
> > Specifically, if I have the following as assert.cpp:
> >
> > #include <assert.h>
> > int main() {
> > assert(false);
> > }
> >
> > and say
> >
> > gcc assert.cpp
> > ./a.exe < /dev/null > output 2>&1
> >
> > I get an error dialog box saying
> >
> > Failed assertion
> > false
> > at line 3 of file assert.cpp
> > in function int main()
> >
> > If I omit either the stdin or the stderr redirection, the program behaves
> > as desired with no dialog box.
> >
> > Is there an environment setting or compiler command-line option I can
> give
> > to suppress the dialog box and always just write a message to stderr and
> > abort? Thanks for any insights.
>
> Your example WFFM, (Cygwin64, gcc 10.2.0, everything else also up to date).
>
> Do you still see this behaviour if you run the installer?
>
Thanks for your reply; unfortunately, yes, it does. I had refreshed
the installation fairly recently, and running the installer only updated a
few things, not cygwin.dll and not gcc; my installation is the same as
yours. I've tried it with three different shells (tcsh, bash, mksh) and
with both gcc and clang, and all have the same behavior. (Interestingly, if
I compile the example with MSVC and run it in a Cygwin shell, it does _not_
pop up an error dialog box, so presumably it's in the Cygwin runtime,
specifically the definition of __assert_func.)
--
William M. (Mike) Miller | Edison Design Group
william.m.miller@gmail.com
next prev parent reply other threads:[~2020-11-14 4:21 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-13 17:27 William M. (Mike) Miller
2020-11-14 3:45 ` Duncan Roe
2020-11-14 4:21 ` William M. (Mike) Miller [this message]
2020-11-14 4:37 ` André Bleau
2020-11-14 5:37 ` Lemures Lemniscati
2020-11-14 14:12 ` William M. (Mike) Miller
2020-11-14 15:24 ` Lemures Lemniscati
2020-11-14 15:53 ` William M. (Mike) Miller
2020-11-15 4:46 ` Duncan Roe
2020-11-15 13:12 ` William M. (Mike) Miller
2020-11-15 20:04 ` André Bleau
2020-11-15 20:39 ` André Bleau
2020-11-15 20:59 ` William M. (Mike) Miller
2020-11-19 14:21 ` Failed assertion dialog box ATTN: Takashi Yano André Bleau
2020-11-19 18:30 ` Thomas Wolff
2020-11-19 21:53 ` André Bleau
2020-11-20 0:06 ` Duncan Roe
2020-11-20 0:19 ` Takashi Yano
2020-11-20 1:40 ` Duncan Roe
2020-11-20 2:04 ` Duncan Roe
2020-11-20 7:09 ` Thomas Wolff
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