1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.rs b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.rs
new file mode 100644
index 000000000..43c1c7759
--- /dev/null
+++ b/src/test/ui/dropck/dropck_no_diverge_on_nonregular_1.rs
@@ -0,0 +1,26 @@
+// Issue 22443: Reject code using non-regular types that would
+// otherwise cause dropck to loop infinitely.
+
+use std::marker::PhantomData;
+
+struct Digit<T> {
+    elem: T
+}
+
+struct Node<T:'static> { m: PhantomData<&'static T> }
+
+
+enum FingerTree<T:'static> {
+    Single(T),
+    // Bug report said Digit after Box would stack overflow (versus
+    // Digit before Box; see dropck_no_diverge_on_nonregular_2).
+    Deep(
+        Box<FingerTree<Node<T>>>,
+        Digit<T>,
+        )
+}
+
+fn main() {
+    let ft = //~ ERROR overflow while adding drop-check rules for FingerTree
+        FingerTree::Single(1);
+}