use strict;

open(IN,"page.html");
$/ = undef;
my $content = <IN>;
close(IN);

print "size: ". length($content) ."\n";

# either of the two regexp cause seg fault!
# $content =~ s/^Set-Cookie: .*$//mgi;   # CORE DUMP

# Also trying to remove the /g option here. 
# Still core dumps.
# $content =~ s/^Set-Cookie: .*$//mi;    # CORE DUMP

# these work fine though...
$content =~ s/^Cache-Control: .*$//mi;   # OK

print "Done.\n";

##</code><code>##

size: 67877
Segmentation fault (core dumped)