error[E0392]: lifetime parameter `'d` is never used
  --> $DIR/variance-regions-indirect.rs:8:26
   |
LL | enum Base<'a, 'b, 'c:'b, 'd> {
   |                          ^^ unused lifetime parameter
   |
   = help: consider removing `'d`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: lifetime parameter `'w` is never used
  --> $DIR/variance-regions-indirect.rs:16:17
   |
LL | struct Derived1<'w, 'x:'y, 'y, 'z> {
   |                 ^^ unused lifetime parameter
   |
   = help: consider removing `'w`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: lifetime parameter `'c` is never used
  --> $DIR/variance-regions-indirect.rs:22:28
   |
LL | struct Derived2<'a, 'b:'a, 'c> {
   |                            ^^ unused lifetime parameter
   |
   = help: consider removing `'c`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: lifetime parameter `'c` is never used
  --> $DIR/variance-regions-indirect.rs:28:28
   |
LL | struct Derived3<'a:'b, 'b, 'c> {
   |                            ^^ unused lifetime parameter
   |
   = help: consider removing `'c`, referring to it in a field, or using a marker such as `PhantomData`

error: ['a: -, 'b: +, 'c: o, 'd: *]
  --> $DIR/variance-regions-indirect.rs:8:1
   |
LL | enum Base<'a, 'b, 'c:'b, 'd> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: ['w: *, 'x: o, 'y: +, 'z: -]
  --> $DIR/variance-regions-indirect.rs:16:1
   |
LL | struct Derived1<'w, 'x:'y, 'y, 'z> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: o, 'b: o, 'c: *]
  --> $DIR/variance-regions-indirect.rs:22:1
   |
LL | struct Derived2<'a, 'b:'a, 'c> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: o, 'b: +, 'c: *]
  --> $DIR/variance-regions-indirect.rs:28:1
   |
LL | struct Derived3<'a:'b, 'b, 'c> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: ['a: -, 'b: +, 'c: o]
  --> $DIR/variance-regions-indirect.rs:34:1
   |
LL | struct Derived4<'a, 'b, 'c:'b> {
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 9 previous errors

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