tests/ui/dropck/dropck_no_diverge_on_nonregular_1.rs

   1 // Issue 22443: Reject code using non-regular types that would
   2 // otherwise cause dropck to loop infinitely.
   3
   4 use std::marker::PhantomData;
   5
   6 struct Digit<T> {
   7     elem: T
   8 }
   9
  10 struct Node<T:'static> { m: PhantomData<&'static T> }
  11
  12
  13 enum FingerTree<T:'static> {
  14     Single(T),
  15     // Bug report said Digit after Box would stack overflow (versus
  16     // Digit before Box; see dropck_no_diverge_on_nonregular_2).
  17     Deep(
  18         Box<FingerTree<Node<T>>>,
  19         Digit<T>,
  20         )
  21 }
  22
  23 fn main() {
  24     let ft = //~ ERROR overflow while adding drop-check rules for FingerTree
  25         FingerTree::Single(1);
  26 }