Improve detection of unsupported regexp syntax
Improve detection of unsupported regexp syntax

Signed-off-by: Lauris Bukšis-Haberkorns <f3041c4c693c07149804ea655e75ee8bb856bd26@nix.lv>

go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry,go-enry/go-enry