error[E0261]: use of undeclared lifetime name `'a` --> $DIR/regions-in-structs.rs:20:9 | LL | a: &'a isize, //~ ERROR use of undeclared lifetime name `'a` | ^^ undeclared lifetime error[E0261]: use of undeclared lifetime name `'a` --> $DIR/regions-in-structs.rs:21:9 | LL | b: &'a isize, //~ ERROR use of undeclared lifetime name `'a` | ^^ undeclared lifetime error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0261`.