problem with current-error-port in scribble interaction

[Jos Koot]

 

Hi,

 

The attachments are assumed to reside in the same directory and

are reduced forms of more elaborated code.

In module try-rkt I have code that captures errors such as

to avoid an error-message being written on the current-error-port,

to retrieve the error-message and to return normally.

This works well as shown in module test-try-rkt.

However, in a scribble interaction as shown in module try-scrbl,

I get page try.html in which the interaction shows the error message

and does not show the value returned by the test-proc.

 

How can I make the interaction behave like in module test-try.rkt?

 

In module try.rkt the use of eval is necessary.

It is a strongly reduced version of a testing system

that accepts sexprs and checks the returned values, the standard output and

the error-message when an error is expected.

 

Best wishes, Jos

[Ryan Culpepper]

The `uncaught-exception-handler` parameter controls the *bottom* of the
exception handler stack, so it won't override the exception handler
installed by Scribble's `interaction` form. If you use `with-handlers`
(or `call-with-exception-handler`) instead, it should work.

The `uncaught-exception-handler` value is inherited by new threads, so
it shouldn't refer to a specific escape continuation. That continuation
(maybe the whole parent thread) may be gone by the time a child thread
raises an exception.

Ryan

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[Jos Koot]

Perfect. (with-handlers ((exn:fail? exception-handler)) ...) works nice.

Thanks very much for your rapid response,

Jos