1const p: *anyopaque = undefined;
 2export fn a() void {
 3    _ = @ptrCast(@ptrCast(p));
 4}
 5export fn b() void {
 6    const ptr1: *u32 = @alignCast(@ptrCast(@alignCast(p)));
 7    _ = ptr1;
 8}
 9export fn c() void {
10    _ = @constCast(@alignCast(@ptrCast(@constCast(@volatileCast(p)))));
11}
12
13// error
14//
15// :3:18: error: redundant @ptrCast
16// :6:44: error: redundant @alignCast
17// :10:40: error: redundant @constCast