error handling on error while reading char literal
error handling on error while reading char literal

leavesbnw/picrin,omasanori/picrin,picrin-scheme/picrin,dcurrie/picrin,omasanori/picrin,leavesbnw/picrin,leavesbnw/picrin,ktakashi/picrin,koba-e964/picrin,dcurrie/picrin,koba-e964/picrin,ktakashi/picrin,koba-e964/picrin,ktakashi/picrin,picrin-scheme/picrin