1 files changed, 24 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-21950.stderr b/src/test/ui/issues/issue-21950.stderr
new file mode 100644
index 000000000..4909398bb
--- /dev/null
+++ b/src/test/ui/issues/issue-21950.stderr
@@ -0,0 +1,24 @@
+error[E0393]: the type parameter `Rhs` must be explicitly specified
+  --> $DIR/issue-21950.rs:10:25
+   |
+LL | trait Add<Rhs=Self> {
+   | ------------------- type parameter `Rhs` must be specified for this
+...
+LL |     let x = &10 as &dyn Add;
+   |                         ^^^ help: set the type parameter to the desired type: `Add<Rhs>`
+   |
+   = note: because of the default `Self` reference, type parameters must be specified on object types
+
+error[E0191]: the value of the associated type `Output` (from trait `Add`) must be specified
+  --> $DIR/issue-21950.rs:10:25
+   |
+LL |     type Output;
+   |     ----------- `Output` defined here
+...
+LL |     let x = &10 as &dyn Add;
+   |                         ^^^ help: specify the associated type: `Add<Output = Type>`
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0191, E0393.
+For more information about an error, try `rustc --explain E0191`.