src/test/ui/issues/issue-27282-mutate-before-diverging-arm-3.stderr

   1 error[E0510]: cannot mutably borrow `x` in match guard
   2   --> $DIR/issue-27282-mutate-before-diverging-arm-3.rs:20:14
   3    |
   4 LL |     match **x {
   5    |           --- value is immutable in match guard
   6 ...
   7 LL |             (|| { *x = &None; drop(force_fn_once); })();
   8    |              ^^   -- borrow occurs due to use of `x` in closure
   9    |              |
  10    |              cannot mutably borrow
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0510`.