This works on Moar and JVM but dies on Parrot: $ perl6-m -e 'my $p = "ab"; substr-rw($p, 0, 3) = "/"; say "--$p--"' ## same output with perl6-j --/--
$ perl6-p -e 'my $p = "ab"; substr-rw($p, 0, 3) = "/"; say "--$p--"' Cannot take substr outside string in sub at gen/parrot/CORE.setting:7740 in any at gen/parrot/BOOTSTRAP.nqp:308 in block <unit> at -e:1 I added a test (fudged 'skip') for Parrot with commit https://github.com/perl6/roast/commit/7eb85d9e18.
