error[E0401]: can't use generic parameters from outer item --> $DIR/const-param-from-outer-fn.rs:3:9 | LL | fn foo() { | - const parameter from outer item LL | fn bar() -> u32 { | - help: try introducing a local generic parameter here: `` LL | X | ^ use of generic parameter from outer item error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0401`.