error: widths must be at least 1 and at most 128
 --> tests_error/struct_width.rs:4:23
  |
4 |     struct MyStructA: 0 {
  |                       ^

error: widths must be at least 1 and at most 128
 --> tests_error/struct_width.rs:8:23
  |
8 |     struct MyStructB: 129 {
  |                       ^^^

error: number too large to fit in target type
  --> tests_error/struct_width.rs:12:23
   |
12 |     struct MyStructC: 680564733841876926926749214863536422912 {
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: invalid digit found in string
  --> tests_error/struct_width.rs:16:23
   |
16 |     struct MyStructD: -1 {
   |                       ^^