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-rw-r--r--src/tools/clippy/tests/ui/map_flatten.fixed4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/map_flatten.fixed b/src/tools/clippy/tests/ui/map_flatten.fixed
index 773b5914439..18846c898da 100644
--- a/src/tools/clippy/tests/ui/map_flatten.fixed
+++ b/src/tools/clippy/tests/ui/map_flatten.fixed
@@ -5,6 +5,7 @@
 #![allow(clippy::missing_docs_in_private_items)]
 #![allow(clippy::map_identity)]
 #![allow(clippy::unnecessary_wraps)]
+#![feature(result_flattening)]
 
 fn main() {
     // mapping to Option on Iterator
@@ -23,4 +24,7 @@ fn main() {
 
     // mapping to Option on Option
     let _: Option<_> = (Some(Some(1))).and_then(|x| x);
+
+    // mapping to Result on Result
+    let _: Result<_, &str> = (Ok(Ok(1))).and_then(|x| x);
 }