tests/cases/compiler/noUnusedLocals_writeOnly.ts(1,12): error TS6133: 'x' is declared but its value is never read.
tests/cases/compiler/noUnusedLocals_writeOnly.ts(18,9): error TS6133: 'z' is declared but its value is never read.


==== tests/cases/compiler/noUnusedLocals_writeOnly.ts (2 errors) ====
    function f(x = 0, b = false) {
               ~
!!! error TS6133: 'x' is declared but its value is never read.
        // None of these statements read from 'x', so it will be marked unused.
        x = 1;
        x++;
        x /= 2;
        ([x] = [1]);
        ({ x } = { x: 1 });
        ({ x: x } = { x: 1 });
        ({ a: [{ b: x }] } = { a: [{ b: 1 }] });
        ({ x = 2 } = { x: b ? 1 : undefined });
        let used = 1;
        ({ x = used } = { x: b ? 1 : undefined });
    
        let y = 0;
        // This is a write access to y, but not a write-*only* access.
        f(y++);
    
        let z = 0;
            ~
!!! error TS6133: 'z' is declared but its value is never read.
        f(z = 1); // This effectively doesn't use `z`, values just pass through it.
    }
    function f2(_: ReadonlyArray<number>): void {}
    