Failure when trying to pass bracket operator as argument to a callback function in generic class

I'm bad at naming threads.

Foo: class <T> {
    _t: T
    init: func (=_t)
    bar: func (callback: Func (T*) -> Bool) {
        if (callback(this[0]&)) {
        } else {
        }
    }
    operator[] (index: Int) -> T {
        _t
    }
}

magic-lang rock compiler 1.0.20
file.ooc: In function ‘file__Foo_bar’:
file.ooc:6:5: error: ‘else’ without a previous ‘if’
} else {
^

Workaround (@marcusnaslund ) :

Foo: class <T> {
    _t: T
    init: func (=_t)
    bar: func (callback: Func (T*) -> Bool) {
        ok: Bool
        ok = callback(this[0]&)
        if (ok) {
        } else {
        }
    }
    operator[] (index: Int) -> T {
        _t
    }
}

[thomasfanell]

Does ok: Bool = callback(this[0]&) work?
We've had some issues with the short-hand := (declare-assign) operator before.

file__Foo_bar’:
file.ooc:6:9: error: ‘ok’ undeclared (first use in this function)
if (ok) {
^
C compiler failed on module okbug from okbug, bailing out