1 files changed, 22 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/unnecessary_cast_unfixable.rs b/src/tools/clippy/tests/ui/unnecessary_cast_unfixable.rs
new file mode 100644
index 000000000..0e027f604
--- /dev/null
+++ b/src/tools/clippy/tests/ui/unnecessary_cast_unfixable.rs
@@ -0,0 +1,22 @@
+#![warn(clippy::unnecessary_cast)]
+
+fn main() {
+    let _ = std::ptr::null() as *const u8;
+}
+
+mod issue11113 {
+    #[repr(C)]
+    struct Vtbl {
+        query: unsafe extern "system" fn(),
+    }
+
+    struct TearOff {
+        object: *mut std::ffi::c_void,
+    }
+
+    impl TearOff {
+        unsafe fn query(&self) {
+            ((*(*(self.object as *mut *mut _) as *mut Vtbl)).query)()
+        }
+    }
+}