| error[E0261]: use of undeclared lifetime name `'undefined` | |
| --> $DIR/undeclared-object-lifetime.rs:6:24 | |
| | | |
| LL | fn f(_: std::cell::Ref<'undefined, dyn std::fmt::Debug>) {} | |
| | ^^^^^^^^^^ undeclared lifetime | |
| | | |
| help: consider introducing lifetime `'undefined` here | |
| | | |
| LL | fn f<'undefined>(_: std::cell::Ref<'undefined, dyn std::fmt::Debug>) {} | |
| | ++++++++++++ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0261`. |