My version of WWW::Mechanize gives no such warning:

$ cat wwwm.pl
use strict;
use warnings;
use WWW::Mechanize;
$ perl -cw wwwm.pl
wwwm.pl syntax OK

[download]

Either you are loading it differently or you are on a different version of WWW::Mechanize - mine is 1.74

In reply to Re^3: Using the syntax checking feature in vim perlsupport plugin by hippo
in thread Using the syntax checking feature in vim perlsupport plugin by nysus

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