ignoremark + ignorecase ignores everything but first letter

[p6rt]

Migrated from rt.perl.org#128875 (status was 'resolved')

Searchable as RT128875$

[p6rt]

From @zoffixznet

If :i and :m are used on the regex, it appears to match the first letter. The returned Match will contains the given string of length that matches the regex​:

m​: say "All hell is breaking loose" ~~ m​:i​:m/"All is fine, I am sure of it"/
rakudo-moar fb4252​: OUTPUT«｢All hell is breaking loose｣␤»

m​: say "Production Ready" ~~ m​:i​:m/"Pfft, Not Yet"/
rakudo-moar fb4252​: OUTPUT«｢Production Re｣␤»

[p6rt]

From @timo

to be more precise, the way we code-gen "literal" qregex nodes with
subtype "ignoremark+ignorecase" will only ever check the ordbaseat of
the first character in the literal against the haystack.

[p6rt]

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

[p6rt]

From @samcv

On Mon, 08 Aug 2016 17​:34​:57 -0700, timo wrote​:

to be more precise, the way we code-gen "literal" qregex nodes with
subtype "ignoremark+ignorecase" will only ever check the ordbaseat of
the first character in the literal against the haystack.

This has been fixed as of Raku/nqp@18e40936a on nqp, and the regex nodes cleaned up.

With the new nqp​::indexicim and eqaticim ops in MoarVM we should have greater maintainability of that code and less difference between the different types of regex, mostly using the same code now.

The rakudo version where I bumped nqp is 2017.05-381-g1ac7996a4

Tests​: I have added tests to roast here, Raku/roast@0a80d0d

[p6rt]

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