Many years ago, I took the advice of the perlunicode manpage and defined a custom regular-expression class for identifying strings that only have kana and not kanji with the \p{...} construct:

sub InKana {
	return <<END;
3040\t309F
30A0\t30FF
END
}

This (and all the other methods in the docs) stopped working somewhere between 5.20.2 and 5.28.0, and there is not even the slightest hint anywhere as to why.

Why? Because there is now a predefined InKana class, not equivalent to the above definition, and the above code is simply ignored. You have to change the name to something, anything else; I chose InHirakata, and my code started working again.

And that’s an hour of my life I want back.

Bug filed; RT #134146.

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