TypeError with method call involving spread operator

[jvasileff]

@chochos the recent fixes look good, but I'm still having trouble with my original use case. Hopefully this is a better approximation:

shared void runTests() {
    value args = ["Cey", "lon"];
    exec2((String x, String y) => x.plus(y), identity<[String, String]>, args);
    // TypeError: Object [object Object] has no method 'plus'

    exec2(uncurry(String.plus), identity<[String, String]>, args);
    // TypeError: Cannot read property 'jsc$' of undefined 
}

void exec2<Args, RawArgs>(
        String(*Args) op,
        Args(RawArgs) transform,
        RawArgs args)
        given Args satisfies Anything[] {
    value [*xs] = transform(args);
    print(op(*xs));
}

I wasn't able to further isolate the issue. The error does not occur if exec2 is removed, with its operations performed directly by runTests. It also works without destructuring:

    value xs = transform(args);
    print(op(*xs));

or by using unflatten as a workaround:

    value [*xs] = transform(args);
    print(unflatten(op)(xs));

[chochos]

Weird, I tested on your original use cases and they all passed.

[chochos]

Mmmm so maybe the problem is in destructuring the args value [*xs] = transform(args)...

[chochos]

ah no, it's something else. Anyway, fix coming right up...

[jvasileff]

Great, thanks! Everything works now.