1 files changed, 74 insertions, 0 deletions
diff --git a/tests/ui/pattern/usefulness/top-level-alternation.stderr b/tests/ui/pattern/usefulness/top-level-alternation.stderr
new file mode 100644
index 000000000..17fa951c5
--- /dev/null
+++ b/tests/ui/pattern/usefulness/top-level-alternation.stderr
@@ -0,0 +1,74 @@
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:4:23
+   |
+LL |     while let 0..=2 | 1 = 0 {}
+   |                       ^
+   |
+note: the lint level is defined here
+  --> $DIR/top-level-alternation.rs:1:9
+   |
+LL | #![deny(unreachable_patterns)]
+   |         ^^^^^^^^^^^^^^^^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:5:20
+   |
+LL |     if let 0..=2 | 1 = 0 {}
+   |                    ^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:9:15
+   |
+LL |             | 0 => {}
+   |               ^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:14:15
+   |
+LL |             | Some(0) => {}
+   |               ^^^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:19:9
+   |
+LL |         (0, 0) => {}
+   |         ^^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:39:9
+   |
+LL |         _ => {}
+   |         ^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:43:9
+   |
+LL |         Some(_) => {}
+   |         ^^^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:44:9
+   |
+LL |         None => {}
+   |         ^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:49:9
+   |
+LL |         None | Some(_) => {}
+   |         ^^^^^^^^^^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:53:9
+   |
+LL |         1..=2 => {},
+   |         ^^^^^
+
+error: unreachable pattern
+  --> $DIR/top-level-alternation.rs:56:14
+   |
+LL |     let (0 | 0) = 0 else { return };
+   |              ^
+
+error: aborting due to 11 previous errors
+