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error[E0261]: use of undeclared lifetime name `'a`
  --> $DIR/method-call-lifetime-args-unresolved.rs:2:15
   |
LL |     0.clone::<'a>();
   |               ^^ undeclared lifetime
   |
help: consider introducing lifetime `'a` here
   |
LL | fn main<'a>() {
   |        ++++

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 <https://github.com/rust-lang/rust/issues/42868>
   = note: `#[warn(late_bound_lifetime_arguments)]` (part of `#[warn(future_incompatible)]`) on by default

error: aborting due to 1 previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0261`.