Reopening file by scalar handler has been broken in perl 5.16.0: open FILE, '>', \my $content or die "Couldn't open scalar filehandle"; open my $fh, ">&=FILE" or die "Couldn't open: $!"; print $fh "Foo-Bar\n"; close $fh; close FILE; print $content; This has been fixed by upstream commit: commit 7b3cf1c058e25efdde99ad84398db2e7bc9892b4 Author: Father Chrysostomos <sprout> Date: Wed Jun 20 23:33:28 2012 -0700 [perl #113764] Make &= duping work with PerlIO::scalar