TypeScript Version: 3.7.2

Search Terms: Put the error message but I don't recognize any similar issue by reading titles.

Code

export class A {
    private field: {} = {};

    public constructor() {
        // empty
    }

    public setField(value: {}): void {
        this.setFieldInternal('field', value);
    }

    private setFieldInternal(name: 'field', value: {}): void {
        this[name] = value;
    }
}

Expected behavior: No error is reported

Actual behavior: 'field' is declared but its value is never read.(6133).

Private member field could be assigned by assigning to this[name] while name has the type 'field' (or any string literal union that contains 'field'). So I believe this error message is incorrect.

If I add readonly to this field, this[name] = value; will report another error: Cannot assign to 'field' because it is a read-only property.

The compiler leaves me no space for writing code like this.

Playground Link: N/A

Related Issues: N/A