chore: checkpoint before Python removal

vendor/tracing-attributes/tests/ui/pass/type_shadowing.rs

@@ -0,0 +1,17 @@
+//! This program is a regression test for [#3306], where shadowing
+//! caused compilation failure in certain cases due to the original
+//! function body not getting its own scope.
+//!
+//! [#3306]: https://github.com/tokio-rs/tracing/issues/3306
+type Foo = ();
+enum Bar {
+    Foo,
+}
+
+#[tracing::instrument]
+fn this_is_fine() -> Foo {
+    // glob import imports Bar::Foo, shadowing Foo
+    use Bar::*;
+}
+
+fn main() {}