Probably meant it causes a warning :)

$ perl -le"use strict; use warnings; use parent qw/ CGI FCGI/; "

$ perl -le"use strict; use warnings; use parent CGI::, FCGI::; "
Bareword "CGI::" refers to nonexistent package at -e line 1.
Bareword "FCGI::" refers to nonexistent package at -e line 1.
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