src/test/ui/closures/closure-immutable-outer-variable.stderr


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error[E0594]: cannot assign to captured outer variable in an `FnMut` closure
  --> $DIR/closure-immutable-outer-variable.rs:11:26
   |
LL |     let y = true;
   |         - help: consider making `y` mutable: `mut y`
LL |     foo(Box::new(move || y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable
   |                          ^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0594`.