error[E0309]: the parameter type `T` may not live long enough --> $DIR/unactionable_diagnostic.rs:21:5 | LL | pub fn bar<'t, T>( | -- the parameter type `T` must be valid for the lifetime `'t` as defined here... ... LL | foo(post, x) | ^^^^^^^^^^^^ ...so that the type `T` will meet its required lifetime bounds | help: consider adding an explicit lifetime bound | LL | pub fn bar<'t, T: 't>( | ++++ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0309`.