1 files changed, 41 insertions, 0 deletions
diff --git a/tests/ui/reachable/unreachable-try-pattern.rs b/tests/ui/reachable/unreachable-try-pattern.rs
new file mode 100644
index 00000000000..23360e73f4a
--- /dev/null
+++ b/tests/ui/reachable/unreachable-try-pattern.rs
@@ -0,0 +1,41 @@
+// check-pass
+#![feature(never_type, exhaustive_patterns)]
+#![warn(unreachable_code)]
+#![warn(unreachable_patterns)]
+
+enum Void {}
+
+impl From<Void> for i32 {
+    fn from(v: Void) -> i32 {
+        match v {}
+    }
+}
+
+fn bar(x: Result<!, i32>) -> Result<u32, i32> {
+    x?
+}
+
+fn foo(x: Result<!, i32>) -> Result<u32, i32> {
+    let y = (match x { Ok(n) => Ok(n as u32), Err(e) => Err(e) })?;
+    //~^ WARN unreachable pattern
+    //~| WARN unreachable expression
+    Ok(y)
+}
+
+fn qux(x: Result<u32, Void>) -> Result<u32, i32> {
+    Ok(x?)
+}
+
+fn vom(x: Result<u32, Void>) -> Result<u32, i32> {
+    let y = (match x { Ok(n) => Ok(n), Err(e) => Err(e) })?;
+    //~^ WARN unreachable pattern
+    Ok(y)
+}
+
+
+fn main() {
+    let _ = bar(Err(123));
+    let _ = foo(Err(123));
+    let _ = qux(Ok(123));
+    let _ = vom(Ok(123));
+}