1 files changed, 20 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-39970.stderr b/src/test/ui/issues/issue-39970.stderr
new file mode 100644
index 000000000..1f64a90bc
--- /dev/null
+++ b/src/test/ui/issues/issue-39970.stderr
@@ -0,0 +1,20 @@
+error[E0271]: type mismatch resolving `for<'a> <() as Array<'a>>::Element == ()`
+  --> $DIR/issue-39970.rs:19:5
+   |
+LL |     <() as Visit>::visit();
+   |     ^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `for<'a> <() as Array<'a>>::Element == ()`
+   |
+note: expected this to be `()`
+  --> $DIR/issue-39970.rs:10:20
+   |
+LL |     type Element = &'a ();
+   |                    ^^^^^^
+note: required because of the requirements on the impl of `Visit` for `()`
+  --> $DIR/issue-39970.rs:13:6
+   |
+LL | impl Visit for () where
+   |      ^^^^^     ^^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0271`.