ken@titan ~/tmp
$ perl -e 'use strict; print "$_\n" for keys %INC;'
strict.pm

ken@titan ~/tmp
$ perl -e 'use strict; my $x = xyz;'
Bareword "xyz" not allowed while "strict subs" in use at -e line 1.
Execution of -e aborted due to compilation errors.

##</code><code>##

ken@titan ~/tmp
$ perl -e 'use 5.012; print "$_\n" for keys %INC;'

ken@titan ~/tmp
$ perl -e 'use 5.012; my $x = xyz;'
Bareword "xyz" not allowed while "strict subs" in use at -e line 1.
Execution of -e aborted due to compilation errors.