From b7e72cc4211d7b06e2b7095f48c579ce1daaf253 Mon Sep 17 00:00:00 2001
From: Yuri Pieters <magejohnyjtp@gmail.com>
Date: Thu, 9 Apr 2020 02:00:08 +0100
Subject: [PATCH] sort.binarySearch: test for regresson of #4980

---
 lib/std/sort.zig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/std/sort.zig b/lib/std/sort.zig
index 91d29dd22d..c6dcaac49e 100644
--- a/lib/std/sort.zig
+++ b/lib/std/sort.zig
@@ -47,6 +47,10 @@ test "std.sort.binarySearch" {
         @as(?usize, null),
         binarySearch(u32, 1, &[_]u32{0}, S.order_u32),
     );
+    testing.expectEqual(
+        @as(?usize, null),
+        binarySearch(u32, 0, &[_]u32{1}, S.order_u32),
+    );
     testing.expectEqual(
         @as(?usize, 4),
         binarySearch(u32, 5, &[_]u32{ 1, 2, 3, 4, 5 }, S.order_u32),