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+The number of elements in an array or slice pattern differed from the number of
+elements in the array being matched.
+
+Example of erroneous code:
+
+```compile_fail,E0527
+let r = &[1, 2, 3, 4];
+match r {
+    &[a, b] => { // error: pattern requires 2 elements but array
+                 //        has 4
+        println!("a={}, b={}", a, b);
+    }
+}
+```
+
+Ensure that the pattern is consistent with the size of the matched
+array. Additional elements can be matched with `..`:
+
+```
+let r = &[1, 2, 3, 4];
+match r {
+    &[a, b, ..] => { // ok!
+        println!("a={}, b={}", a, b);
+    }
+}
+```