$ perl -c -e'3/0' -e syntax OK $ perl -e'3/0' Illegal division by zero at -e line 1. #### $ perl -e'chop "fred"' Can't modify constant item in chop at -e line 1, at EOF Execution of -e aborted due to compilation errors. #### $ perl -e'"fred" = $_' Can't modify constant item in scalar assignment at -e line 1, at EOF Execution of -e aborted due to compilation errors.