|  | error[E0401]: can't use generic parameters from outer item | 
|  | --> $DIR/issue-3021-c.rs:4:24 | 
|  | | | 
|  | LL | fn siphash<T>() { | 
|  | |            - type parameter from outer item | 
|  | LL | | 
|  | LL |     trait U { | 
|  | |            - help: try introducing a local generic parameter here: `<T>` | 
|  | LL |         fn g(&self, x: T) -> T; | 
|  | |                        ^ use of generic parameter from outer item | 
|  |  | 
|  | error[E0401]: can't use generic parameters from outer item | 
|  | --> $DIR/issue-3021-c.rs:4:30 | 
|  | | | 
|  | LL | fn siphash<T>() { | 
|  | |            - type parameter from outer item | 
|  | LL | | 
|  | LL |     trait U { | 
|  | |            - help: try introducing a local generic parameter here: `<T>` | 
|  | LL |         fn g(&self, x: T) -> T; | 
|  | |                              ^ use of generic parameter from outer item | 
|  |  | 
|  | error: aborting due to 2 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0401`. |