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From:	"Andrej Borsenkow" <Andrej DOT Borsenkow AT mow DOT siemens DOT ru>
To:	<Cygwin AT Sourceware DOT Cygnus DOT Com>
Subject:	Exit code zero in case of STATUS_ACCESS_VIOLATION - AC_TRY_RUN confused
Date:	Wed, 26 Jul 2000 11:13:10 +0400
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> > This particular problem was due to tgetent() problem. Zsh tests, if
> > tgetent() accepts null pointer for buffer. Unfortunately,
> test always
> > succeeded, but running under gdb showed, that Zsh crashed in
> > tgetent(0,"cygwin").
> >

Test succeeded because you get exit status 0 in case of program crash
(and AC_TRY_RUN believed everything O.K.):

mw1g017 AT MW1G17C ~/src/temcap
$ cat main.c
main()
{
    int i = tgetent((char*)0,"vt100");
    if (i > 0) {
        char tbuf[1024], *u;
        u = tbuf;
        tgetstr("cl", &u);
    }
    exit(!i || i == -1);
}

mw1g017 AT MW1G17C ~/src/temcap
$ gcc -o main main.c -ltermcap

mw1g017 AT MW1G17C ~/src/temcap
$ ./main
      0 [main] main 1010 handle_exceptions: Exception:
STATUS_ACCESS_VIOLATION
   3317 [main] main 1010 stackdump: Dumping stack trace to
main.exe.stackdump

mw1g017 AT MW1G17C ~/src/temcap
$ echo $?
0

Is it expected? The above is exact test as used in Zsh. (ncurses
obviously has more friendly tgetent() :-)

-andrej

P.S. I'd appreciate Cc as I am not on this list.


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