error[E0392]: lifetime parameter `'a` is never used
  --> $DIR/variance-regions-direct.rs:52:14
   |
LL | struct Test7<'a> {
   |              ^^ unused lifetime parameter
   |
   = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`

error: ['a: +, 'b: +, 'c: +]
  --> $DIR/variance-regions-direct.rs:9:1
   |
LL | struct Test2<'a, 'b, 'c> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: -, 'b: -, 'c: -]
  --> $DIR/variance-regions-direct.rs:18:1
   |
LL | struct Test3<'a, 'b, 'c> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: +, 'b: o]
  --> $DIR/variance-regions-direct.rs:27:1
   |
LL | struct Test4<'a, 'b:'a> {
   | ^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: -, 'b: o]
  --> $DIR/variance-regions-direct.rs:35:1
   |
LL | struct Test5<'a, 'b:'a> {
   | ^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: +, 'b: o]
  --> $DIR/variance-regions-direct.rs:45:1
   |
LL | struct Test6<'a, 'b:'a> {
   | ^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: *]
  --> $DIR/variance-regions-direct.rs:52:1
   |
LL | struct Test7<'a> {
   | ^^^^^^^^^^^^^^^^

error: ['a: -, 'b: +, 'c: o]
  --> $DIR/variance-regions-direct.rs:60:1
   |
LL | enum Test8<'a, 'b, 'c:'b> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 8 previous errors

For more information about this error, try `rustc --explain E0392`.