Recompiling a RegExp at runtime using \p fails

[atoomic]

When recompiling a regexp using \p the recompiled RegExp is incorrect

our ( $q, $myre );
BEGIN { $q = qr[\p{IsWord}] }
eval q/$myre = qr[^$q]/; # add ^ to force the RegExp to be recompiled
print qq[match ok\n] if q[hello] =~ $myre;

The compiled version output nothing (no segfault) whereas we should expect match ok output

tested with HEAD @ 5f74704

[rurban]

MOTHER_RE is missing from $q, the REGEXP.
That's the only difference I've found, and the most likely cause to create a OPFAIL (-Dr) instead of the POSIXU[\w]

[atoomic]

we have added a function to utf8 heavy to clear the cache to solve this issue
view cpanel@4993d9b