$ perl -le'my $x = chomp( <STDIN> )'
Can't modify <HANDLE> in chomp at -e line 1, at end of line
Execution of -e aborted due to compilation errors.
$ perl -le'my $x = chomp( readline STDIN )'
Can't modify <HANDLE> in chomp at -e line 1, at end of line
Execution of -e aborted due to compilation errors.