1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/rustdoc/synthetic_auto/self-referential.rs b/src/test/rustdoc/synthetic_auto/self-referential.rs
new file mode 100644
index 000000000..ccef901b1
--- /dev/null
+++ b/src/test/rustdoc/synthetic_auto/self-referential.rs
@@ -0,0 +1,29 @@
+// Some unusual code minimized from
+// https://github.com/sile/handy_async/tree/7b619b762c06544fc67792c8ff8ebc24a88fdb98
+
+pub trait Pattern {
+    type Value;
+}
+
+pub struct Constrain<A, B = A, C = A>(A, B, C);
+
+impl<A, B, C> Pattern for Constrain<A, B, C>
+    where A: Pattern,
+          B: Pattern<Value = A::Value>,
+          C: Pattern<Value = A::Value>,
+{
+    type Value = A::Value;
+}
+
+pub struct Wrapper<T>(T);
+
+impl<T> Pattern for Wrapper<T> {
+    type Value = T;
+}
+
+
+// @has self_referential/struct.WriteAndThen.html
+// @has - '//*[@id="synthetic-implementations-list"]//*[@class="impl has-srclink"]//h3[@class="code-header in-band"]' \
+// "impl<P1> Send for WriteAndThen<P1>  where  <P1 as Pattern>::Value: Send"
+pub struct WriteAndThen<P1>(pub P1::Value,pub <Constrain<P1, Wrapper<P1::Value>> as Pattern>::Value)
+    where P1: Pattern;