From 84619abe9f16bc030c5bdb888f47a9b49b87c2ff Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Tue, 12 Dec 2017 21:50:37 -0500
Subject: [PATCH] add test for allowing slice[slice.len..slice.len]

---
 test/cases/slice.zig | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/cases/slice.zig b/test/cases/slice.zig
index 1498f948ea..44df8aa612 100644
--- a/test/cases/slice.zig
+++ b/test/cases/slice.zig
@@ -1,4 +1,5 @@
 const assert = @import("std").debug.assert;
+const mem = @import("std").mem;
 
 const x = @intToPtr(&i32, 0x1000)[0..0x500];
 const y = x[0x100..];
@@ -15,3 +16,12 @@ test "slice child property" {
     var slice = array[0..];
     assert(@typeOf(slice).Child == i32);
 }
+
+test "debug safety lets us slice from len..len" {
+    var an_array = []u8{1, 2, 3};
+    assert(mem.eql(u8, sliceFromLenToLen(an_array[0..], 3, 3), ""));
+}
+
+fn sliceFromLenToLen(a_slice: []u8, start: usize, end: usize) -> []u8 {
+    return a_slice[start..end];
+}