On Windows 8 Release Preview with GCC 4.7.1 (prerelease), this crash
doesn't happen anymore, whether it was the os or gcc.
2012/6/5 Ruben Van Boxem <vanboxem.ru...@gmail.com>:
> 2012/6/4 Deniz Sarikaya <daiml...@googlemail.com>
>>
>> 2012/6/4 Ruben Van Boxem <vanboxem.ru...@gmail.com>:
>> > Op 4 jun. 2012 23:06 schreef "Deniz Sarikaya" <daiml...@googlemail.com>
>> > het
>> > volgende:
>> >
>> >
>> >>
>> >> Hello,
>> >>
>> >> I don't know why, but this scenario crashes for me with gcc 4.7.0
>> >> rubenvb on Windows 8 x64:
>> >
>> > What Windows 8 version. Developer Preview? Consumer Preview? Release
>> > Preview?
>> Consumer Preview
>
>
> Try the Release Preview. This might just well be an OS bug.
>
>>
>> >
>> >
>> >> "#include <fstream>
>> >> struct Testfile
>> >> {
>> >> std::fstream t;
>> >> }
>> >
>> > You're missing a semicolon here.
>> It's not missing in my cpp file ;)
>> >
>> >> int main()
>> >> {
>> >> Testfile t;
>> >> }"
>> >>
>> >> backtrace:
>> >>
>> >> #0 6FCB8F96 ?? () (??:??)
>> >> #1 004013ED __tmainCRTStartup()
>> >>
>> >>
>> >> (/home/ruben/mingw-w64/toolchain/src/mingw-w64/tags/v2.0.3/mingw-w64-crt/crt/crtexe.c:307)
>> >> #2 75C0DE7D ?? () (??:??)
>> >> #3 77AE4B54 ?? () (??:??)
>> >> #4 77AE4B27 ?? () (??:??)
>> >> #5 ?? ?? () (??:??)
>> >>
>> >> When using "Step Into" with GDB 7.4.1 till it crashes, it stops here:
>> >> <fstream>
>> >> basic_fstream()
>> >> : __iostream_type(), _M_filebuf()
>> >> { this->init(&_M_filebuf); }
>> >
>> > On what line does it crash? What's the value of "this"?
>> >
>> > What compiler options did you use? It seems some debug info is missing.
>> > Try
>> > adding "-g3" and make sure no "-s" is passed when linking.
>> Apparently, this crash only happens with -O123 (not with -Os).
>> The exact location changes every time, but its always somewhere in
>> fstream in the constructors of fstream classes.
>> Adding "-g3" didn't change anything, also there's no "-s".
>> The value of "this" is "value has been optimized out".
>
>
> OK, that limits it to these options (listed at -O equivalent -O1):
> http://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/Optimize-Options.html#Optimize-Options
>
> If you could determine which one, this would be helpful to find the problem.
> Heck, it might even be -fomit-frame-pointer, but that's also used to build
> the gcc executables themselves. It must be a combination of factors, with
> the most likely being a problem with the prerelease Windows.
>
>> >
>> > Ruben
>> >
>> >>
>> >> Thanks,
>> >>
>> >>
>> >>
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