1const A = packed struct {
 2    a: u2,
 3    b: u6,
 4};
 5const B = packed struct {
 6    q: u8,
 7    a: u2,
 8    b: u6,
 9};
10export fn entry() void {
11    var a = A{ .a = 2, .b = 2 };
12    var b = B{ .q = 22, .a = 3, .b = 2 };
13    var t: usize = 0;
14    _ = &t;
15    const ptr = switch (t) {
16        0 => &a.a,
17        1 => &b.a,
18        else => unreachable,
19    };
20    if (ptr.* == 2) {
21        @compileError("wrong compile error");
22    }
23}
24// error
25//
26// :15:17: error: incompatible types: '*align(1:0:1) u2' and '*align(2:8:2) u2'
27// :16:14: note: type '*align(1:0:1) u2' here
28// :17:14: note: type '*align(2:8:2) u2' here