## 
# This isn't part of the core logic: we're just trying to make regexp
# generation easy for admins with weak regex chops
# The original use case used regexps to select files of interest.
my @name_patterns = qw { *.conf$ ^ho ^net };
my @name_regexps = map { s/\./\\./g;
            s/\*/(\.+)?/g;
            qr {$_}; } @name_patterns;
[download]

The  * glob pattern can match zero characters but you are replacing it with  (\.+)? which has to match at least one character.   Perhaps you want to use this instead:  s/\*/(?s:.*?)/g;   And don't forget the  ? glob pattern which must match one character:  s/\?/(?s:.)/g;

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