| error[E0720]: cannot resolve opaque type | |
| --> $DIR/binding-without-value.rs:5:13 | |
| | | |
| LL | let _ : impl Copy; | |
| | - ^^^^^^^^^ cannot resolve opaque type | |
| | | | |
| | this binding might not have a concrete type | |
| | | |
| help: set the binding to a value for a concrete type to be resolved | |
| | | |
| LL | let _ : impl Copy = /* value */; | |
| | ^^^^^^^^^^^^^ | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0720`. |