From @LLFourn

my $i = 0;
say "ooo" ~~ / "o" ** {1..$i} / #-> ｢ooo｣

It is impossible to match "one or more up to a maximum of zero" times. This
should just fail to match. If you do a literal '1' without it does the
right thing​:

perl6 - e 'say "ooo" ~~ / "o" ** 1..0 /'

===SORRY!=== Error while compiling -e
Empty range

LL

From @FCO

Em Sat, 04 Mar 2017 01​:09​:20 -0800, lloyd.fourn@​gmail.com escreveu​:

my $i = 0;
say "ooo" ~~ / "o" ** {1..$i} / #-> ｢ooo｣

It is impossible to match "one or more up to a maximum of zero" times. This
should just fail to match. If you do a literal '1' without it does the
right thing​:

perl6 - e 'say "ooo" ~~ / "o" ** 1..0 /'

===SORRY!=== Error while compiling -e
Empty range

LL

even with literal 0, but inside of {} it doesn't work​:

$ ./perl6 -e 'say "ooo" ~~ / "o" ** {1..1} /'
｢o｣
$ ./perl6 -e 'say "ooo" ~~ / "o" ** {1..0} /'
｢ooo｣
$ ./perl6 -e 'say "ooo" ~~ / "o" ** 1..0 /'
===SORRY!=== Error while compiling -e
Empty range
at -e​:1
------> say "ooo" ~~ / "o" ** 1..0⏏ /

The RT System itself - Status changed from 'new' to 'open'

From @zoffixznet

On Sat, 04 Mar 2017 01​:09​:20 -0800, lloyd.fourn@​gmail.com wrote​:

my $i = 0;
say "ooo" ~~ / "o" ** {1..$i} / #-> ｢ooo｣

It is impossible to match "one or more up to a maximum of zero" times. This
should just fail to match. If you do a literal '1' without it does the
right thing​:

perl6 - e 'say "ooo" ~~ / "o" ** 1..0 /'

===SORRY!=== Error while compiling -e
Empty range

LL

Thank you for the report. This is now fixed.

Fix​: rakudo/rakudo@681d6be9742e7c0
Test​: Raku/roast@99c822abdeefbbaf0

@zoffixznet - Status changed from 'open' to 'resolved'