this has already been fixed by #7392 now the tests are failing, no surprise, what is your failing use case ?

I made the following tests:

php > var_dump(preg_match('#[^\p{L}\p{N} ]#u', "\x7F\xFF"));
bool(false)
php > var_dump(preg_match('#[^\p{L}\p{N} ]#u', "abc\x7F\xFF"));
bool(false)
php > var_dump(preg_match('#[^\p{L}\p{N} ]#u', "abc"));
int(0)

This cant work. What was your initial goal?

afaik \x7F\xFF is not a valid utf8 sequence. Let me reiterate. Neither \x7f or \xff are valid. The max hex value of a 1st utf-8 byte is 0xDF (0b110xxxxx) and of the second 0xBF(0b10xxxxxx)

Sorry it is wrong PR. Please delete it.

@mvrhov this is the point, test valid & invalid utf-8 sequences.