perl_construct segfaults under cygwin

[Luke Diamand]

I'm seeing the call to perl_construct() segfault under cygwin. The same 
code works fine on linux.

Here's the code:

#include <EXTERN.h>
#include <perl.h>
static PerlInterpreter *my_perl;

int main() {
         my_perl = perl_alloc();
         perl_construct(my_perl);
         printf("Hooray\n");
}

The last 10 lines of the backtrace give:
#0  0x10072547 in cygperl5_8_2!Perl_sv_add_arena ()
    from /usr/bin/cygperl5_8_2.dll
#1  0x1007dc8b in cygperl5_8_2!Perl_newSVpvn () from 
/usr/bin/cygperl5_8_2.dll
#2  0x10058488 in cygperl5_8_2!Perl_savesharedpv ()
    from /usr/bin/cygperl5_8_2.dll
#3  0x100586b7 in cygperl5_8_2!Perl_vmess () from /usr/bin/cygperl5_8_2.dll
#4  0x10059171 in cygperl5_8_2!Perl_vcroak () from /usr/bin/cygperl5_8_2.dll
#5  0x1005963f in cygperl5_8_2!Perl_croak_nocontext ()
    from /usr/bin/cygperl5_8_2.dll
#6  0x1000ae1b in cygperl5_8_2!Perl_malloc () from /usr/bin/cygperl5_8_2.dll
#7  0x1007254c in cygperl5_8_2!Perl_sv_add_arena ()
    from /usr/bin/cygperl5_8_2.dll
#8  0x1007dc8b in cygperl5_8_2!Perl_newSVpvn () from 
/usr/bin/cygperl5_8_2.dll
#9  0x10058488 in cygperl5_8_2!Perl_savesharedpv ()
    from /usr/bin/cygperl5_8_2.dll
(More stack frames follow...)


The last few lines of the backtrace appear to be:

#35002 0x10058488 in cygperl5_8_2!Perl_savesharedpv ()
    from /usr/bin/cygperl5_8_2.dll
#35003 0x100586b7 in cygperl5_8_2!Perl_vmess () from /usr/bin/cygperl5_8
#35004 0x10059171 in cygperl5_8_2!Perl_vcroak ()
    from /usr/bin/cygperl5_8_2.dll
#35005 0x1005963f in cygperl5_8_2!Perl_croak_nocontext ()
    from /usr/bin/cygperl5_8_2.dll
#35006 0x1000ae1b in cygperl5_8_2!Perl_malloc ()
    from /usr/bin/cygperl5_8_2.dll
#35007 0x1007254c in cygperl5_8_2!Perl_sv_add_arena ()
    from /usr/bin/cygperl5_8_2.dll
#35008 0x10079a0e in cygperl5_8_2!Perl_newSV () from /usr/bin/cygperl5_8
#35009 0x100014ac in perl_construct () from /usr/bin/cygperl5_8_2.dll
#35010 0x0040108d in cygcrypt-0!crypt ()
#35011 0x6101c868 in dlerror () from /usr/bin/cygwin1.dll

I've seen a suggestion elsewhere that this is new in 5.8.2, although I 
can't verify this myself, since I haven't worked out how to downgrade to 
anything newer than cygwin perl 5.6.

Thanks in advance
Luke Diamand


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