false cannot be treated as failure within a non-void failure context

General Issues and Bug Reporting
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1

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Verse

What Type of Bug are you experiencing?

Verse

Summary

While the official documentation states that using false? marks a function as failing, when actually executed, it throws an error saying, "This function returns a value of type int, but the function body’s result is an incompatible value of type logic.

Steps to Reproduce

Find(X:[]int, F(:int)<decides><transacts>:void)<decides>:int =
        for (Y:X, F[Y]):
            return Y
        false?

Expected Result

It is treated as a failure by false.

Observed Result

The error message "This function returns a value of type int, but the function body’s result is an incompatible value of type logic.

Platform(s)

All

Additional Notes

The expression return Y will exit the function Find, returning the value contained in Y to the caller of the function. Note false? is used as a way to force the function to fail. In this case, this is sensible, since no value matching the predicate F was found in X. In the case of a function defined as returning void, an expression doesn’t need to be provided with the return expression.