1 files changed, 27 insertions, 4 deletions
diff --git a/src/test/ui/pattern/slice-pattern-const.rs b/src/test/ui/pattern/slice-pattern-const.rs
index d353f6cddbd..f0a04513f91 100644
--- a/src/test/ui/pattern/slice-pattern-const.rs
+++ b/src/test/ui/pattern/slice-pattern-const.rs
@@ -1,4 +1,4 @@
-//compile-pass
+#![deny(unreachable_patterns)]
 
 fn main() {
     let s = &[0x00; 4][..]; //Slice of any value
@@ -6,19 +6,42 @@ fn main() {
     match s {
         MAGIC_TEST => (),
         [0x00, 0x00, 0x00, 0x00] => (),
-        [84, 69, 83, 84] => (), // this should warn
+        [84, 69, 83, 84] => (), //~ ERROR unreachable pattern
         _ => (),
     }
     match s {
         [0x00, 0x00, 0x00, 0x00] => (),
         MAGIC_TEST => (),
-        [84, 69, 83, 84] => (), // this should warn
+        [84, 69, 83, 84] => (), //~ ERROR unreachable pattern
         _ => (),
     }
     match s {
         [0x00, 0x00, 0x00, 0x00] => (),
         [84, 69, 83, 84] => (),
-        MAGIC_TEST => (), // this should warn
+        MAGIC_TEST => (), //~ ERROR unreachable pattern
         _ => (),
     }
+    const FOO: [u8; 1] = [4];
+    match [99] {
+        [0x00] => (),
+        [4] => (),
+        FOO => (), //~ ERROR unreachable pattern
+        _ => (),
+    }
+    const BAR: &[u8; 1] = &[4];
+    match &[99] {
+        [0x00] => (),
+        [4] => (),
+        BAR => (), //~ ERROR unreachable pattern
+        b"a" => (),
+        _ => (),
+    }
+
+    const BOO: &[u8; 0] = &[];
+    match &[] {
+        [] => (),
+        BOO => (), //~ ERROR unreachable pattern
+        b"" => (), //~ ERROR unreachable pattern
+        _ => (), //~ ERROR unreachable pattern
+    }
 }