improve parent expr check

2 files changed, 24 insertions, 0 deletions

diff --git a/tests/ui/needless_match.fixed b/tests/ui/needless_match.fixed
index d55dd589a54..9ccccaa1725 100644
--- a/tests/ui/needless_match.fixed
+++ b/tests/ui/needless_match.fixed
@@ -182,4 +182,16 @@ mod issue8551 {
     }
 }
 
+trait Tr {
+    fn as_mut(&mut self) -> Result<&mut i32, &mut i32>;
+}
+impl Tr for Result<i32, i32> {
+    fn as_mut(&mut self) -> Result<&mut i32, &mut i32> {
+        match self {
+            Ok(x) => Ok(x),
+            Err(e) => Err(e),
+        }
+    }
+}
+
 fn main() {}
diff --git a/tests/ui/needless_match.rs b/tests/ui/needless_match.rs
index f3c7ee01a47..d210ecff7f1 100644
--- a/tests/ui/needless_match.rs
+++ b/tests/ui/needless_match.rs
@@ -219,4 +219,16 @@ mod issue8551 {
     }
 }
 
+trait Tr {
+    fn as_mut(&mut self) -> Result<&mut i32, &mut i32>;
+}
+impl Tr for Result<i32, i32> {
+    fn as_mut(&mut self) -> Result<&mut i32, &mut i32> {
+        match self {
+            Ok(x) => Ok(x),
+            Err(e) => Err(e),
+        }
+    }
+}
+
 fn main() {}