$ perl -MO=Deparse -we '$x = anything_could_go_here::'
Bareword "anything_could_go_here::" refers to nonexistent package at -
+e line 1.
Name "main::x" used only once: possible typo at -e line 1.
BEGIN { $^W = 1; }
$x = 'anything_could_go_here';
-e syntax OK
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