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use std::ops::Index;
struct Test;
struct Container(Test);
impl Test {
fn test(&mut self) {}
}
impl<'a> Index<&'a bool> for Container {
type Output = Test;
fn index(&self, _index: &'a bool) -> &Test {
&self.0
}
}
fn main() {
let container = Container(Test);
let mut val = true;
container[&mut val].test(); //~ ERROR: cannot borrow data
}
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