1 files changed, 33 insertions, 0 deletions
diff --git a/tests/ui/diagnostic-width/E0271.rs b/tests/ui/diagnostic-width/E0271.rs
new file mode 100644
index 000000000..7e6b71408
--- /dev/null
+++ b/tests/ui/diagnostic-width/E0271.rs
@@ -0,0 +1,33 @@
+// compile-flags: --diagnostic-width=40
+// normalize-stderr-test: "long-type-\d+" -> "long-type-hash"
+trait Future {
+    type Error;
+}
+
+impl<T, E> Future for Result<T, E> {
+    type Error = E;
+}
+
+impl<T> Future for Option<T> {
+    type Error = ();
+}
+
+struct Foo;
+
+fn foo() -> Box<dyn Future<Error=Foo>> {
+    Box::new( //~ ERROR E0271
+        Ok::<_, ()>(
+            Err::<(), _>(
+                Ok::<_, ()>(
+                    Err::<(), _>(
+                        Ok::<_, ()>(
+                            Err::<(), _>(Some(5))
+                        )
+                    )
+                )
+            )
+        )
+    )
+}
+fn main() {
+}