src/test/ui/issues/issue-42106.rs

   1 fn do_something<T>(collection: &mut Vec<T>) {
   2     let _a = &collection;
   3     collection.swap(1, 2); //~ ERROR also borrowed as immutable
   4     _a.use_ref();
   5 }
   6
   7 fn main() { }
   8
   9 trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
  10 impl<T> Fake for T { }