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error[E0499]: cannot borrow `y` as mutable more than once at a time
--> $DIR/issue-18783.rs:7:21
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LL | c.push(Box::new(|| y = 0));
| -- - first borrow occurs due to use of `y` in closure
| |
| first mutable borrow occurs here
LL | c.push(Box::new(|| y = 0));
| ^^ - second borrow occurs due to use of `y` in closure
| |
| second mutable borrow occurs here
LL |
LL | }
| - first borrow might be used here, when `c` is dropped and runs the destructor for type `RefCell<Vec<Box<dyn FnMut()>>>`
error[E0499]: cannot borrow `y` as mutable more than once at a time
--> $DIR/issue-18783.rs:16:29
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LL | Push::push(&c, Box::new(|| y = 0));
| -- - first borrow occurs due to use of `y` in closure
| |
| first mutable borrow occurs here
LL | Push::push(&c, Box::new(|| y = 0));
| ^^ - second borrow occurs due to use of `y` in closure
| |
| second mutable borrow occurs here
LL |
LL | }
| - first borrow might be used here, when `c` is dropped and runs the destructor for type `RefCell<Vec<Box<dyn FnMut()>>>`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0499`.
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