$ alias perle alias perle='perl -Mstrict -Mwarnings -Mautodie=:all -MCarp::Always -E' $ perle ' my $expected_error = 1; my $got_error = 0; eval { my @rgb = qw{#ff0000 #00ff00 #0000ff}; open my $fh, "<", "nonexistent_file"; 1; } or do { $got_error = 1; }; say "\$expected_error[$expected_error] \$got_error[$got_error]"; ' Possible attempt to put comments in qw() list at -e line 6. $expected_error[1] $got_error[1]