I am quite sure, that sometimes regexm() answers true (1) und sometimes fals (0) if the first argument is an empty string.
Examples:
regexm("", "i") -> 1
regexm("", "a") -> 0
If you try these examples the answer you get might be true resp. false in both cases.
Mit freundlichen Grüßen
Alois Harrasser
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