I tried the "naughty pointer" test from Language / Pointers and it didn't compile (with Zig 0.13.0):

test "naughty pointer" {
    var x: u16 = 0;
    var y: *u8 = @ptrFromInt(x);
    _ = y;
}

For both variables it said error: local variable is never mutated and note: consider using 'const'.

So I guess instead it should now be:

test "naughty pointer" {
    const x: u16 = 0;
    const y: *u8 = @ptrFromInt(x);
    _ = y;
}

I would have opened a pull request, but I think the output of the test also needs updating (because now it's a different, cleaner message), and my test files wouldn't match yours so it wouldn't look good.