1 files changed, 16 insertions, 0 deletions
diff --git a/tests/rustdoc-ui/infinite-recursive-type-impl-trait-return.stderr b/tests/rustdoc-ui/infinite-recursive-type-impl-trait-return.stderr
new file mode 100644
index 000000000..aff7402bc
--- /dev/null
+++ b/tests/rustdoc-ui/infinite-recursive-type-impl-trait-return.stderr
@@ -0,0 +1,16 @@
+error[E0072]: recursive type `DEF_ID` has infinite size
+  --> $DIR/infinite-recursive-type-impl-trait-return.rs:7:5
+   |
+LL |     enum E {
+   |     ^^^^^^
+LL |         This(E),
+   |              - recursive without indirection
+   |
+help: insert some indirection (e.g., a `DEF_ID`) to break the cycle
+   |
+LL |         This(Box<E>),
+   |              ++++ +
+
+error: aborting due to previous error
+
+For more information about this error, try `DEF_ID`.