error[E0261]: use of undeclared lifetime name `'missing` --> $DIR/region-error-ice-109072.rs:8:9 | LL | impl Lt<'missing> for () { | - ^^^^^^^^ undeclared lifetime | | | help: consider introducing lifetime `'missing` here: `<'missing>` error[E0261]: use of undeclared lifetime name `'missing` --> $DIR/region-error-ice-109072.rs:9:15 | LL | type T = &'missing (); | ^^^^^^^^ undeclared lifetime | help: consider introducing lifetime `'missing` here | LL | type T<'missing> = &'missing (); | ++++++++++ help: consider introducing lifetime `'missing` here | LL | impl<'missing> Lt<'missing> for () { | ++++++++++ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0261`.