chore: checkpoint before Python removal

vendor/pin-project/tests/ui/cfg/packed_sneaky-span-issue-2.rs

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+use auxiliary_macro::hidden_repr;
+use pin_project::pin_project;
+
+#[pin_project]
+#[hidden_repr(packed)] //~ ERROR may not be used on #[repr(packed)] types
+struct S {
+    #[cfg(any())]
+    #[pin]
+    f: u32,
+    #[cfg(not(any()))]
+    #[pin]
+    f: u8,
+}
+
+fn main() {}