|  | error[E0261]: use of undeclared lifetime name `'a` | 
|  | --> $DIR/generic-extern-lifetime.rs:6:26 | 
|  | | | 
|  | LL |     pub fn life2<'b>(x: &'a i32, y: &'b i32); | 
|  | |                          ^^ undeclared lifetime | 
|  | | | 
|  | help: consider introducing lifetime `'a` here | 
|  | | | 
|  | LL |     pub fn life2<'a, 'b>(x: &'a i32, y: &'b i32); | 
|  | |                  +++ | 
|  |  | 
|  | error[E0261]: use of undeclared lifetime name `'a` | 
|  | --> $DIR/generic-extern-lifetime.rs:8:37 | 
|  | | | 
|  | LL |     pub fn life4<'b>(x: for<'c> fn(&'a i32)); | 
|  | |                                     ^^ undeclared lifetime | 
|  | | | 
|  | = note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html | 
|  | help: consider making the type lifetime-generic with a new `'a` lifetime | 
|  | | | 
|  | LL |     pub fn life4<'b>(x: for<'a, 'c> fn(&'a i32)); | 
|  | |                             +++ | 
|  | help: consider introducing lifetime `'a` here | 
|  | | | 
|  | LL |     pub fn life4<'a, 'b>(x: for<'c> fn(&'a i32)); | 
|  | |                  +++ | 
|  |  | 
|  | error[E0261]: use of undeclared lifetime name `'a` | 
|  | --> $DIR/generic-extern-lifetime.rs:11:39 | 
|  | | | 
|  | LL |     pub fn life7<'b>() -> for<'c> fn(&'a i32); | 
|  | |                                       ^^ undeclared lifetime | 
|  | | | 
|  | help: consider making the type lifetime-generic with a new `'a` lifetime | 
|  | | | 
|  | LL |     pub fn life7<'b>() -> for<'a, 'c> fn(&'a i32); | 
|  | |                               +++ | 
|  | help: consider introducing lifetime `'a` here | 
|  | | | 
|  | LL |     pub fn life7<'a, 'b>() -> for<'c> fn(&'a i32); | 
|  | |                  +++ | 
|  |  | 
|  | error: aborting due to 3 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0261`. |