1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/closures/2229_closure_analysis/migrations/migrations_rustfix.rs b/src/test/ui/closures/2229_closure_analysis/migrations/migrations_rustfix.rs
new file mode 100644
index 000000000..2237bebd7
--- /dev/null
+++ b/src/test/ui/closures/2229_closure_analysis/migrations/migrations_rustfix.rs
@@ -0,0 +1,46 @@
+// run-rustfix
+#![deny(rust_2021_incompatible_closure_captures)]
+//~^ NOTE: the lint level is defined here
+
+// Test the two possible cases for automated migartion using rustfix
+// - Closure contains a block i.e.  `|| { .. };`
+// - Closure contains just an expr `|| ..;`
+
+#[derive(Debug)]
+struct Foo(i32);
+impl Drop for Foo {
+    fn drop(&mut self) {
+        println!("{:?} dropped", self.0);
+    }
+}
+
+fn closure_contains_block() {
+    let t = (Foo(0), Foo(0));
+    let c = || {
+        //~^ ERROR: drop order
+        //~| NOTE: for more information, see
+        //~| HELP: add a dummy let to cause `t` to be fully captured
+        let _t = t.0;
+        //~^ NOTE: in Rust 2018, this closure captures all of `t`, but in Rust 2021, it will only capture `t.0`
+    };
+
+    c();
+}
+//~^ NOTE: in Rust 2018, `t` is dropped here, but in Rust 2021, only `t.0` will be dropped here as part of the closure
+
+fn closure_doesnt_contain_block() {
+    let t = (Foo(0), Foo(0));
+    let c = || t.0;
+    //~^ ERROR: drop order
+    //~| NOTE: in Rust 2018, this closure captures all of `t`, but in Rust 2021, it will only capture `t.0`
+    //~| NOTE: for more information, see
+    //~| HELP: add a dummy let to cause `t` to be fully captured
+
+    c();
+}
+//~^ NOTE: in Rust 2018, `t` is dropped here, but in Rust 2021, only `t.0` will be dropped here as part of the closure
+
+fn main() {
+    closure_contains_block();
+    closure_doesnt_contain_block();
+}