1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/traits/impl-implicit-trait.rs b/tests/ui/traits/impl-implicit-trait.rs
new file mode 100644
index 00000000000..fac2bcce248
--- /dev/null
+++ b/tests/ui/traits/impl-implicit-trait.rs
@@ -0,0 +1,26 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(non_camel_case_types)]
+
+// pretty-expanded FIXME #23616
+
+enum option_<T> {
+    none_,
+    some_(T),
+}
+
+impl<T> option_<T> {
+    pub fn foo(&self) -> bool { true }
+}
+
+enum option__ {
+    none__,
+    some__(isize)
+}
+
+impl option__ {
+    pub fn foo(&self) -> bool { true }
+}
+
+pub fn main() {
+}