version bump: 1.0.0 -> (breaking) -> 2.0.0
warning: technically breaking changes in `Def`
 --> structs/new.rs:6:1
  |
6 | pub struct Def<A=u8> {
  | ^^^^^^^^^^^^^^^^^^^^
  |
  = note: defaulted type parameter added (non-breaking)
note: item made public (technically breaking)
 --> structs/new.rs:7:5
  |
7 |     pub field: A,
  |     ^^^^^^^^^^^^

error: breaking changes in `Def2`
  --> structs/new.rs:10:1
   |
10 | pub struct Def2<A=u16> {
   | ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: defaulted type parameter added (non-breaking)
   = warning: type error: expected `u8`, found `u16` (breaking)

error: breaking changes in `Efg`
  --> structs/new.rs:14:1
   |
14 | pub struct Efg {
   | ^^^^^^^^^^^^^^
   |
   = warning: type error: expected `u8`, found `u16` (breaking)

warning: technically breaking changes in `Fgh`
  --> structs/new.rs:18:1
   |
18 | pub struct Fgh {
   | ^^^^^^^^^^^^^^
   |
note: item made public (technically breaking)
  --> structs/new.rs:19:5
   |
19 |     pub field: u8,
   |     ^^^^^^^^^^^^^

error: breaking changes in `Ghi`
  --> structs/new.rs:22:1
   |
22 | pub struct Ghi {
   | ^^^^^^^^^^^^^^
   |
warning: item made private (breaking)
  --> structs/new.rs:23:5
   |
23 |     field: u8,
   |     ^^^^^^^^^

error: breaking changes in `Hij`
  --> structs/new.rs:26:1
   |
26 | pub struct Hij {
   | ^^^^^^^^^^^^^^
   |
warning: tuple struct with no public fields changed to a regular struct (breaking)
  --> structs/new.rs:26:1
   |
26 | pub struct Hij {
   | ^^^^^^^^^^^^^^

warning: technically breaking changes in `Iij`
  --> structs/new.rs:30:1
   |
30 | pub struct Iij {
   | ^^^^^^^^^^^^^^
   |
note: private field removed from struct with private fields (non-breaking)
  --> structs/old.rs:29:5
   |
29 |     field: u16,
   |     ^^^^^^^^^^
note: public field added to struct with private fields (technically breaking)
  --> structs/new.rs:31:5
   |
31 |     pub field1: u8,
   |     ^^^^^^^^^^^^^^
note: public field added to struct with private fields (technically breaking)
  --> structs/new.rs:32:5
   |
32 |     pub field2: u8,
   |     ^^^^^^^^^^^^^^

error: aborting due to 4 previous errors; 3 warnings emitted