assert value bound to current-(input|output|error)-port is port
assert value bound to current-(input|output|error)-port is port

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