warning: `&` without an explicit lifetime name cannot be used here
  --> $DIR/double-elided.rs:4:14
   |
LL |     const C: &&str = &"";
   |              ^
   |
   = 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 #115010 <https://github.com/rust-lang/rust/issues/115010>
   = note: `#[warn(elided_lifetimes_in_associated_constant)]` on by default
help: use the `'static` lifetime
   |
LL |     const C: &'static &str = &"";
   |               +++++++

warning: `&` without an explicit lifetime name cannot be used here
  --> $DIR/double-elided.rs:4:15
   |
LL |     const C: &&str = &"";
   |               ^
   |
   = 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 #115010 <https://github.com/rust-lang/rust/issues/115010>
help: use the `'static` lifetime
   |
LL |     const C: &&'static str = &"";
   |                +++++++

error[E0491]: in type `&&str`, reference has a longer lifetime than the data it references
  --> $DIR/double-elided.rs:4:5
   |
LL |     const C: &&str = &"";
   |     ^^^^^^^^^^^^^^^^^^^^^
   |
note: the pointer is valid for the anonymous lifetime as defined here
  --> $DIR/double-elided.rs:4:14
   |
LL |     const C: &&str = &"";
   |              ^
note: but the referenced data is only valid for the anonymous lifetime as defined here
  --> $DIR/double-elided.rs:4:14
   |
LL |     const C: &&str = &"";
   |              ^

error: aborting due to previous error; 2 warnings emitted

For more information about this error, try `rustc --explain E0491`.