version: 0.7.1 0 7 1
directed -- 0
Use of uninitialized value in say at lib/Graph/igraph.pm line 34.

Attempt to free unreferenced scalar: SV 0x21213d8 at /home/fgabolde/perl5/perlbrew/perls/perl-5.18.4/lib/site_perl/5.18.4/x86_64-linux/FFI/Platypus.pm line 331.
$VAR1 = bless( do{\(my $o = undef)}, 'Graph::igraph' );
*** Error in `perl': realloc(): invalid next size: 0x000000000223f850 ***