[sage-support] Re: Reserved words (Sage + Cython)
Hi Oleksandr, On 17 Feb., 21:52, Oleksandr Kazymyrov vrona.aka.ham...@gmail.com wrote: Can anyone reproduce the same bug on Ubuntu? The situation somehow reminds me a problem that I once had with a wrapper of the C-MeatAxe (an implementation of matrices that I use it in an optional Sage package). There was a C-function (I think it was called matid), but in order to make it work on Solaris, I had to rename the function. It turned out that the linker was mistaking the function with another function of the same name in a totally different package. So, that should probably be called a Solaris bug, not a Sage bug. If a similar thing is happening here as well, I suggest to be practical: Rename it, if that solves the problem. Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Reserved words (Sage + Cython)
Hi Simon, Rename it, if that solves the problem. I have done it. But I wonder why has that happened after upgrade from 4.7.2 to 4.8 (5.0beta4)? Best regards, Oleksandr -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Reserved words (Sage + Cython)
In gmane.comp.mathematics.sage.support, you wrote: After upgrading from version 4.7.2 to 4.8, one function of dozen is stopped working. I use a combination of Sage + Cython. You can find examples in the attachments. The main problem is: when you use PC as the function name in *.c file sage gives an error /home/hamsin/bin/sage/local/lib/libcsage.so(print_backtrace+0x31)[0x7f3c8b89e3a3] /home/hamsin/bin/sage/local/lib/libcsage.so(sigdie+0x14)[0x7f3c8b89e3d5] /home/hamsin/bin/sage/local/lib/libcsage.so(sage_signal_handler+0x20e)[0x7f3c8b89e000] /lib/x86_64-linux-gnu/libpthread.so.0(+0x10060)[0x7f3c8dc93060] /home/hamsin/bin/sage/local/lib/libreadline.so.6(PC+0x0)[0x7f3c861f83cc] Unhandled SIGSEGV: A segmentation fault occurred in Sage. This probably occurred because a *compiled* component of Sage has a bug in it and is not properly wrapped with sig_on(), sig_off(). You might want to run Sage under gdb with 'sage -gdb' to debug this. Sage will now terminate. local/bin/sage-sage: line 460: 10163 Segmentation fault python $@ If I use PCc or PC_1, then there are no problems. So this is a bug, feature or Cython has limitations on function names. If the last point, then where I can see this limitations. I imagine the behaviour is similar to Python's, where it's jolly possible to do list=2 and see stuff beginning to happen... Just in case, Dima Best regards, Oleksandr -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Reserved words (Sage + Cython)
Hi Dima, hi Oleksandr, On 17 Feb., 14:07, Dima Pasechnik dimp...@gmail.com wrote: I imagine the behaviour is similar to Python's, where it's jolly possible to do list=2 and see stuff beginning to happen... But the only difference between the good and the bad version is that some function is called PC in the bad file and PCc in the good file. I guess that PC is not a reserved word. However, Oleksandr: What is one supposed to do in order to reproduce the error? When I start a sage session and attach Main.sage, then it fails with both the bad and the good version. Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Reserved words (Sage + Cython)
Dear Simon, But the only difference between the good and the bad version is that some function is called PC in the bad file and PCc in the good file Yes, exactly. However, Oleksandr: What is one supposed to do in order to reproduce the error? When I start a sage session and attach Main.sage, then it fails with both the bad and the good version. You should replace: if __name__ == __main__: sys.exit(main()) by main() Or just run Main.sage from a shell (in this case, variable PATH should has a path to the sage directory, like this one PATH=/home/user/bin/sage/:$PATH). Best regards, Oleksandr -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Reserved words (Sage + Cython)
Dear Oleksandr,
On 17 Feb., 15:32, Oleksandr Kazymyrov vrona.aka.ham...@gmail.com
wrote:
Or just run Main.sage from a shell (in this case, variable PATH should
has a path to the sage directory, like this one
PATH=/home/user/bin/sage/:$PATH).
Then I can not reproduce it.
I started a Sage shell, and did
%%%
(sage subshell) linux-sqwp:CythonBad simon$ PATH=/home/simon/SAGE/work/
cython_change/CythonBad/:$PATH
SAGE_ROOT=/home/simon/SAGE/sage-5.0.prealpha0
(sage subshell) linux-sqwp:CythonBad simon$ ls
CFunc.spyx CSbox.sage Functions.c Main.py Main.sage Sbox.sage
SAGE_ROOT=/home/simon/SAGE/sage-5.0.prealpha0
(sage subshell) linux-sqwp:CythonBad simon$ ./Main.sage
Compiling ./CFunc.spyx...
in c_PC
in PC
out in_PC
PC = 0
(sage subshell) linux-sqwp:CythonBad simon$ cat Functions.c
int PC()
{
printf(in PC\n);
return 0;
}
%
So, it is indeed the bad version, but there is no segmentation
fault.
As you can see, this is with a recent development version of Sage. The
machine:
simon@linux-sqwp:~ uname -a
Linux linux-sqwp.site 3.1.9-1.4-desktop #1 SMP PREEMPT Fri Jan 27
08:55:10 UTC 2012 (efb5ff4) x86_64 x86_64 x86_64 GNU/Linux
simon@linux-sqwp:~ cat /etc/issue
Welcome to openSUSE 12.1 Asparagus - Kernel \r (\l).
simon@linux-sqwp:~ gcc --version
gcc (SUSE Linux) 4.6.2
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
Best regards,
Simon
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