Static index signatures do not ensure consistency across index kinds within the same class

[weswigham]

⏯ Playground Link

Playground link

💻 Code

// non-static equivalent, for reference
class Q {
    readonly [s: string]: number;
    readonly [s: number]: 42 | 233
}

class W extends Q {
    readonly [s: string]: number
}

class EW extends W {
    readonly [s: string]: boolean
    readonly [s: number]: 1 
}

// static example
class B {
    static readonly [s: string]: number;
    static readonly [s: number]: 42 | 233
}

class D extends B {
    static readonly [s: string]: number
}

class ED extends D {
    static readonly [s: string]: boolean
    static readonly [s: number]: 1 // should error, 1 isn't assignable to `boolean`!
}

🙁 Actual behavior

No error.

🙂 Expected behavior

Numeric index type '1' is not assignable to string index type 'boolean'.