Added test explicitly testing that this PR continues to handle empty arrays in same manner as before.

Author: pnkfelix

src/test/ui/rfc1445/match-empty-array-allowed-without-eq-issue-62336.rs

@@ -0,0 +1,17 @@
+// Pre-existing behavior has been to reject patterns with consts
+// denoting non-empty arrays of non-`Eq` types, but *accept* empty
+// arrays of such types.
+//
+// See rust-lang/rust#62336.
+
+// run-pass
+
+#[derive(PartialEq, Debug)]
+struct B(i32);
+
+fn main() {
+    const FOO: [B; 0] = [];
+    match [] {
+        FOO => { }
+    }
+}