src/test/ui/issues/issue-34349.rs

   1 // This is a regression test for a problem encountered around upvar
   2 // inference and trait caching: in particular, we were entering a
   3 // temporary closure kind during inference, and then caching results
   4 // based on that temporary kind, which led to no error being reported
   5 // in this particular test.
   6
   7 fn main() {
   8     let inc = || {};
   9     inc();
  10
  11     fn apply<F>(f: F) where F: Fn() {
  12         f()
  13     }
  14
  15     let mut farewell = "goodbye".to_owned();
  16     let diary = || { //~ ERROR E0525
  17         farewell.push_str("!!!");
  18         println!("Then I screamed {}.", farewell);
  19     };
  20
  21     apply(diary);
  22 }