Quantified (*COMMIT) fails to fire

[p5pRT]

Migrated from rt.perl.org#126343 (status was 'new')

Searchable as RT126343$

[p5pRT]

From 0perlbugs@rexegg.com

Hi Yves,

Here is another (*COMMIT) behavior that feels wrong (it fails to fire).

if ('1213' =~ /(?​:1(*COMMIT)2)+./ ) { print "\$&='$&'\n"; }
# $&='121'

The engine matches '12', then it matches '1' and the (*COMMIT) token.
When the second '2' fails, the engine somehow manages to backtrack across (*COMMIT), which never fires.