- raise OBJprocedure
Raise an exception. OBJ can be any scheme object. Invokes the 'current exception handler' thunk, which is the car of the *current-exception-handlers* list. This handler thunk handles the exception OBJ.
The handler thunk should then either call error to stop program execution, or it should have stored the continuation at which to resume execution of the program after handling the exception, and pass it's result to that continuation where the program's flow of execution will resume.
Installing an exception handler that returns will cause the raise procedure to abort the program by call error, alerting that the exception handler thunk erroneously returned control to the raise procedure instead of to a different continuation as it should.