Segmentation fault

nite_man has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Segmentation fault by Improv (Pilgrim) on Apr 03, 2003 at 14:52 UTC
There are some things that can be the fault of the hardware (bad memory or faulty CPU), some that can be the fault of the package (are you using redhat's Perl, or did you build your own?), some that might be because of you using less reliable features of Perl (signal handling can be iffy, as threads once were), and some might be legitimate bugs in perl (although these are pretty rare). Can you give us more information on what your script is trying to do, when it crashes, and what you're running it on?	[reply]
Re: Re: Segmentation fault by nite_man (Deacon) on Apr 03, 2003 at 15:11 UTC
I use Perl from Red Hat package. The script developed with Tk. Generally, script works correctly. This error shows only when I exit from my application. This code for exit button: `Button(-text=> "Exit", -command=> sub { Quiting::quiting(); }, ) ->pack(-side=> 'bottom', -fill => 'x', -expand => 1 );` [download] and `package Quiting; sub quiting { # Delete a temporary file system ('rm /tmp/mytmp.txt') if (-e '/tmp/mytmp.txt'); exit(0); }` [download] `--------> SV* sv_bless(SV* sv, HV* stash);` [download]	[reply] [d/l] [select]
Re: Segmentation fault by converter (Priest) on Apr 03, 2003 at 22:56 UTC
Unless you're importing Tk in your Quiting package, you're calling `CORE::exit`. Try calling `Tk::exit` instead. If that doesn't work, you can always invoke the MainWindow Toplevel's `destroy` method and place your cleanup code after the call to MainLoop.	[reply] [d/l] [select]
Re: Segmentation fault by nite_man (Deacon) on Apr 03, 2003 at 15:59 UTC
I tried to trace my application by `strace -f` and I found that error 'Segmentation fault' shows after calling `gettimeofday()` function. I found too, that this function consists only into the binary file Event.so (which belong to Tk package) from dir auto. Maybe this error is bag of Tk::Event? `--------> SV* sv_bless(SV* sv, HV* stash);` [download]	[reply] [d/l] [select]
Re: Re: Segmentation fault by iburrell (Chaplain) on Apr 03, 2003 at 17:58 UTC
It is probably a bug in the Event.so shared library. In my experience, segmentation faults with Perl are almost always caused by C extension libraries. One thing to check is the versions of the binary modules and the supporting libraries they use. What version of Perl/Tk are you using? Did you build the Tk module yourself or install a packaged distribution? Version mismatches between the module and the support library, and between Perl and the mdoule, always cause problems.	[reply]
Re: Re: Re: Segmentation fault by nite_man (Deacon) on Apr 03, 2003 at 20:16 UTC
I use latest varsion Perl/Tk - Tk-800.024 and I installed it from CPAN archive. I'm agree with you maybe this error caused not correct C library. Ok, many thanks, I will try to resolve this trouble! `--------> SV* sv_bless(SV* sv, HV* stash);` [download]	[reply] [d/l]


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