Please see Tina and my comments on github.
https://github.com/ingydotnet/yaml-libyaml-pm/issues/69
There's a simple patch proposed, which was sufficient for my purposes.
In reply to Re^3: YAML::XS perl/regexp (?u:(?u:
by Boldra
in thread YAML::XS perl/regexp (?u:(?u:
by Boldra
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