Phil,

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I ran into problems using lambda expressions as callbacks when wrapping libcsv and I've boiled it down to this testcase. Can anybody tell me why this crashes?:

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looper is a c function which takes a scheme lambda and repeated invokes it using the 'call_lambda' bridging function.

When I gsc compile it and run '(main)' after a bunch of looping and printing it crashes with: ERROR IN looper -- Operator is not a PROCEDURE ('#<return #2>)

Any ideas? (or am I being stupid?!)

I'm just guessing here, but could it be that, since your lambda expression is not reference anywhere else in your Scheme code, it gets GC'd?

I'm not so sure about my diagnostic anymore... I've able to reproduce your problem and it only shows up when started from the OS shell. If I first load your (compiled) code in gsi and then evaluate '(main)', I don't get the problem at all.

That's strange... Marc, any idea?

Dominique