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error[E0716]: temporary value dropped while borrowed
  --> $DIR/temporary-lifetime-extension-tuple-ctor.rs:34:19
   |
LL |     let g = some(&temp());
   |                   ^^^^^^ - temporary value is freed at the end of this statement
   |                   |
   |                   creates a temporary value which is freed while still in use
LL |     println!("{a:?} {b:?} {c:?} {d:?} {e:?} {f:?} {g:?}");
   |                                                    - borrow later used here
   |
help: consider using a `let` binding to create a longer lived value
   |
LL ~     let binding = temp();
LL ~     let g = some(&binding);
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0716`.