error: expected identifier, found reserved identifier `_`
  --> $DIR/infer-arg-test.rs:7:17
   |
LL | struct BadInfer<_>;
   |                 ^ expected identifier, found reserved identifier

error: expected identifier, found reserved identifier `_`
  --> $DIR/infer-arg-test.rs:13:17
   |
LL | fn bad_infer_fn<_>() {}
   |                 ^ expected identifier, found reserved identifier

error[E0392]: parameter `_` is never used
  --> $DIR/infer-arg-test.rs:7:17
   |
LL | struct BadInfer<_>;
   |                 ^ unused parameter
   |
   = help: consider removing `_`, referring to it in a field, or using a marker such as `PhantomData`
   = help: if you intended `_` to be a const parameter, use `const _: usize` instead

error: aborting due to 3 previous errors

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