# A simple perl script to generate a warning
: perl -we 'my $t; my $t'
"my" variable $t masks earlier declaration in same scope at -e line 1.
# the same with STDOUT redirected to null
: perl -we 'my $t; my $t' >/dev/null
"my" variable $t masks earlier declaration in same scope at -e line 1.
# same with STDERR to null, aaah the sound of silence
: perl -we 'my $t; my $t' 2>/dev/null
: