The following commit has been proposed for 5.30.2: https://perl5.git.perl.org/perl5.git/commit/ac3afc4b35675aec55918770197358190f78 regcomp.c: make \K+ and \K* illegal. However, it adds a new fatal error, which we undertake not to do in maint releases (see perlpolicy.pod). Unless there is some overriding (security-based) need to have it then I think we should not, at least in its current form. If it really is an essential fix to include then is there some way to rework it that retains the fix itself but without introducing the new error?Thread Next