1 files changed, 21 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-17959.rs b/tests/ui/issues/issue-17959.rs
new file mode 100644
index 000000000..8bf9e6236
--- /dev/null
+++ b/tests/ui/issues/issue-17959.rs
@@ -0,0 +1,21 @@
+extern crate core;
+
+use core::ops::Drop;
+
+trait Bar {}
+
+struct G<T: ?Sized> {
+    _ptr: *const T
+}
+
+impl<T> Drop for G<T> {
+//~^ ERROR `Drop` impl requires `T: Sized`
+    fn drop(&mut self) {
+        if !self._ptr.is_null() {
+        }
+    }
+}
+
+fn main() {
+    let x:G<dyn Bar>;
+}