src/test/ui/nll/issue-54556-niconii.stderr

   1 error[E0597]: `counter` does not live long enough
   2   --> $DIR/issue-54556-niconii.rs:22:20
   3    |
   4 LL |     if let Ok(_) = counter.lock() { }
   5    |                    ^^^^^^^-------
   6    |                    |
   7    |                    borrowed value does not live long enough
   8    |                    a temporary with access to the borrow is created here ...
   9 ...
  10 LL | }
  11    | -
  12    | |
  13    | `counter` dropped here while still borrowed
  14    | ... and the borrow might be used here, when that temporary is dropped and runs the destructor for type `std::result::Result<MutexGuard<'_>, ()>`
  15    |
  16 help: consider adding semicolon after the expression so its temporaries are dropped sooner, before the local variables declared by the block are dropped
  17    |
  18 LL |     if let Ok(_) = counter.lock() { };
  19    |                                      ^
  20
  21 error: aborting due to previous error
  22
  23 For more information about this error, try `rustc --explain E0597`.