1export fn entry1() void {
 2    const x: u32 = 123;
 3    const ptr: [*]const u32 = @ptrCast(&x);
 4    _ = ptr - 1;
 5}
 6
 7export fn entry2() void {
 8    const S = extern struct { x: u32, y: u32 };
 9    const y: u32 = 123;
10    const parent_ptr: *const S = @fieldParentPtr("y", &y);
11    _ = parent_ptr;
12}
13
14// error
15//
16// :4:13: error: pointer computation here causes illegal behavior
17// :4:13: note: resulting pointer exceeds bounds of containing value which may trigger overflow
18// :10:55: error: pointer computation here causes illegal behavior
19// :10:55: note: resulting pointer exceeds bounds of containing value which may trigger overflow