Expected noImplicitAny error on 4.0 control flow analyzed static class properties

[DanielRosenwasser]

// @noImplicitAny: true
class Square {
    static sideLength;
    constructor(sideLength: number) {
        this.sideLength = sideLength;
    }
}

Expected

Two errrors:

Member 'sideLength' implicitly has an 'any' type.
Property 'sideLength' is a static member of type 'Square'

Actual

One error

Property 'sideLength' is a static member of type 'Square'