Follow-up Comment #4, bug #59676 (project groff):
The "exists" documentation linked in comment #1 contains the sentence
"WARNING: Calling 'exists' on array values is strongly discouraged." I
presume this is what Bjarni is referring to.
In these instances, "exists" is being called on hash values (the function's
intended use), so Perl wouldn't have anything to warn about.
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