Pike 9.0 quirk with implicit lambda

[Chris Angelico]

void call(function cb) {cb(42);}
int main() {
    werror("Pike version %O:\n", __VERSION__);
    call() {
        werror("Args: %O\n", __ARGS__);
        mixed value = 1234;
        werror("%O\n", lambda() {werror("%O\n", value);});
    };
    return 0;
}


In Pike 8 (tested on 8.1.15), the implicit lambda correctly receives
its __ARGS__, and will happily provide those as closure variables. In
Pike 9 (tested with current master, 235eb5), the inner function
somehow causes __ARGS__ to be 0 instead of an array.

Any ideas as to what's going on here? Am I misusing implicit lambdas?

ChrisA