error[E0261]: use of undeclared lifetime name `'a` --> $DIR/method-call-lifetime-args-unresolved.rs:2:15 | LL | fn main() { | - help: consider introducing lifetime `'a` here: `<'a>` LL | 0.clone::<'a>(); | ^^ undeclared lifetime warning: cannot specify lifetime arguments explicitly if late bound lifetime parameters are present --> $DIR/method-call-lifetime-args-unresolved.rs:2:15 | LL | 0.clone::<'a>(); | ^^ --> $SRC_DIR/core/src/clone.rs:LL:COL | = note: the late bound lifetime parameter is introduced here | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #42868 = note: `#[warn(late_bound_lifetime_arguments)]` on by default error: aborting due to 1 previous error; 1 warning emitted For more information about this error, try `rustc --explain E0261`.