$ perl -c   959680.pl
Type of arg 1 to push must be array (not scalar dereference) at 959680.pl line 95, near "@list;"
Type of arg 1 to push must be array (not scalar dereference) at 959680.pl line 96, near "@callers;"
Type of arg 1 to push must be array (not scalar dereference) at 959680.pl line 112, near "@list;"
959680.pl had compilation errors.