Add tests for fixed issues

src/test/ui/infinite-recursion-const-fn.rs

@@ -0,0 +1,18 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//https://github.com/rust-lang/rust/issues/31364
+
+#![feature(const_fn)]
+const fn a() -> usize { b() }
+const fn b() -> usize { a() }
+const ARR: [i32; a()] = [5; 6]; //~ ERROR constant evaluation error
+
+fn main(){}

src/test/ui/infinite-recursion-const-fn.stderr

@@ -0,0 +1,8 @@
+error[E0080]: constant evaluation error
+  --> $DIR/infinite-recursion-const-fn.rs:16:18
+   |
+16 | const ARR: [i32; a()] = [5; 6]; //~ ERROR constant evaluation error
+   |                  ^^^ miri failed: reached the configured maximum number of stack frames
+
+error: aborting due to previous error
+