$ ./yawp.st
Throwing yawp
Object: nil error: Yawp!
Error(Exception)>>signal (AnsiExcept.st:216)
Error(Exception)>>signal: (AnsiExcept.st:226)
UndefinedObject(Object)>>error: (AnsiExcept.st:1565)
UndefinedObject>>executeStatements (yawp.st:5)