From f082e253b56b98a806e5ec047c5eb197b2c8ab88 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sun, 1 Mar 2020 01:17:50 -0500
Subject: [PATCH] fix native OS version detection on macOS

closes #4583
---
 lib/std/zig/system.zig | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/std/zig/system.zig b/lib/std/zig/system.zig
index 5767291de7..df50b4a4c2 100644
--- a/lib/std/zig/system.zig
+++ b/lib/std/zig/system.zig
@@ -232,7 +232,7 @@ pub const NativeTargetInfo = struct {
                     // supports
                     std.os.sysctlbynameC(
                         "kern.osproductversion",
-                        &product_version[0],
+                        &product_version,
                         &size,
                         null,
                         0,
@@ -241,7 +241,8 @@ pub const NativeTargetInfo = struct {
                         else => unreachable,
                     };
 
-                    if (std.builtin.Version.parse(product_version[0..size])) |ver| {
+                    const string_version = product_version[0 .. size - 1 :0];
+                    if (std.builtin.Version.parse(string_version)) |ver| {
                         os.version_range.semver.min = ver;
                         os.version_range.semver.max = ver;
                     } else |err| switch (err) {