1 files changed, 19 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-51907.rs b/src/test/ui/issues/issue-51907.rs
new file mode 100644
index 000000000..9378f4357
--- /dev/null
+++ b/src/test/ui/issues/issue-51907.rs
@@ -0,0 +1,19 @@
+// run-pass
+trait Foo {
+    extern "C" fn borrow(&self);
+    extern "C" fn take(self: Box<Self>);
+}
+
+struct Bar;
+impl Foo for Bar {
+    #[allow(improper_ctypes_definitions)]
+    extern "C" fn borrow(&self) {}
+    #[allow(improper_ctypes_definitions)]
+    extern "C" fn take(self: Box<Self>) {}
+}
+
+fn main() {
+    let foo: Box<dyn Foo> = Box::new(Bar);
+    foo.borrow();
+    foo.take()
+}