use strict qw(@ISA);

##</code><code>##

$ perl5.8.1 -Mstrict=@ISA -e '$foo = 1'
Unknown 'strict' tag(s) '@ISA' at -e line 0
BEGIN failed--compilation aborted.

##</code><code>##

$ perl5.8.0 -Mstrict=@ISA -e '$foo = 1'

##</code><code>##

$ perl5.8.0 -Mstrict -e '$foo = 1'
Global symbol "$foo" requires explicit package name at -e line 1.
Execution of -e aborted due to compilation errors.