Re: SWIG+Perl+C free() error and zero pointer on very simple script Bug # 1035817

Bryga 66 wrote:
> This was submitted as BUG # 1035817 on Sourceforge.
> Any insight is greatly appreciated.
>
> We use SWIG to wrap some simple C code into a Perl
> Module.
>
> Using the module in a simple script produces an error
> like
> free(): invalid pointer 0x816c138! 
> Also a string seems to be improperly passed as a zero
> pointer to the underlying C code.
>
> To see the problem untar the attached file and execute
> the following commands:
>
> $ swig -perl SwigTest.i;                              
>                                                       
>   $ gcc -D_GNU_SOURCE -I/usr/include
> -I/usr/local/include
> -I/usr/lib/perl5/5.8.3/i586-linux-thread-multi/CORE -c
> SwigTest_wrap.c SwigTest.c;                           
> $ gcc -shared SwigTest.o SwigTest_wrap.o -o
> swigTest.so;
> $ ./SwigTest.pl
>
> The problem occurs under the following Linux
> environment
> uname -a: i686, SuSE 9.1, kernel 2.6.5-7.108-default,
> perl -v: v5.8.3 built for i586-linux-thread-multi,
> swig -version: SWIG Version 1.3.21, Compiled with g++
> [i686-pc-linux-gnu]
>
> We don't really think it's environment specific as we
> have similar problems on Sparc Solaris and with
> various recent versions of SWIG and Perl including
> Perl 5.8.5 and SWIG 1.3.22

See comments in bug report. Please close #1035734 if it is the same problem.

William
_______________________________________________
Swig maillist  -  Swig@xxxxxxxxxxxxxxx
http://mailman.cs.uchicago.edu/mailman/listinfo/swig