1const p: ?*const u8 = null;
 2export fn a() void {
 3    _ = @as(*const u32, @ptrCast(@alignCast(p)));
 4}
 5export fn b() void {
 6    _ = @constCast(@volatileCast(123));
 7}
 8export fn c() void {
 9    const x: ?*f32 = @ptrCast(@addrSpaceCast(@constCast(@volatileCast(p))));
10    _ = x;
11}
12
13// error
14//
15// :3:45: error: null pointer casted to type '*const u32'
16// :6:34: error: expected pointer type, found 'comptime_int'
17// :9:22: error: @ptrCast increases pointer alignment
18// :9:71: note: '?*const u8' has alignment '1'
19// :9:22: note: '?*f32' has alignment '4'
20// :9:22: note: use @alignCast to assert pointer alignment