[ sisc-Bugs-1448219 ] unoptimisation blows up interpreter

Bugs item #1448219, was opened at 2006-03-12 10:12
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 7
Submitted By: Matthias Radestock (mradestock)
Assigned to: Nobody/Anonymous (nobody)
Summary: unoptimisation blows up interpreter

Initial Comment:
SISC (1.13.0-alpha)
#;> (define my+ +)
#;> (define (f) (+ (begin (string) (my+))))
#;> (f)
0
#;> (define (my+ . args) (apply + args))
#;> (f)
Exception in thread "Thread-2"
sisc.exprs.fp.OptimismUnwarrantedException
	at
sisc.exprs.fp.FixedAppExp_0.revert(FixedAppExp_0.java:99)
	at
sisc.exprs.fp.FixedAppExp_0.revert(FixedAppExp_0.java:88)
	at
sisc.exprs.fp.FixedAppExp_0.getValue(FixedAppExp_0.java:54)
	at sisc.exprs.fp.FixedAppExp_0.eval(FixedAppExp_0.java:38)
	at
sisc.interpreter.Interpreter.interpret(Interpreter.java:139)
	at
sisc.interpreter.Interpreter.interpret(Interpreter.java:128)
	at sisc.interpreter.Interpreter.eval(Interpreter.java:290)
	at sisc.data.SchemeThread.run(SchemeThread.java:60)
	at java.lang.Thread.run(Thread.java:595)

Process scheme finished


The problem here is that the optimistic my+ call is
executed not by its hosting expression - which would
have caught the exception and re-executed itself - but
by the ordinary interpreter loop.

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