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Backporting ac3afc4b35 (regcomp.c: make \K+ and \K* illegal.)

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Steve Hay via perl5-porters
February 7, 2020 18:08
Backporting ac3afc4b35 (regcomp.c: make \K+ and \K* illegal.)
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The following commit has been proposed for 5.30.2:
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?

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