From 758f6228f48c0f94b60976f23c48b405d16135ff Mon Sep 17 00:00:00 2001
From: hryx <codroid@gmail.com>
Date: Fri, 5 Jul 2019 00:36:34 -0700
Subject: [PATCH] Prevent unreachable when file ends with struct field

---
 std/zig/parser_test.zig | 9 +++++++++
 std/zig/render.zig      | 2 +-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/std/zig/parser_test.zig b/std/zig/parser_test.zig
index f78e666779d8..e22d7d424d6d 100644
--- a/std/zig/parser_test.zig
+++ b/std/zig/parser_test.zig
@@ -2246,6 +2246,15 @@ test "zig fmt: if type expr" {
     );
 }
 
+test "zig fmt: file ends with struct field" {
+    try testTransform(
+        \\a: bool
+    ,
+        \\a: bool,
+        \\
+    );
+}
+
 const std = @import("std");
 const mem = std.mem;
 const warn = std.debug.warn;
diff --git a/std/zig/render.zig b/std/zig/render.zig
index 2e8e4481bea5..b717607e8a1b 100644
--- a/std/zig/render.zig
+++ b/std/zig/render.zig
@@ -1898,7 +1898,7 @@ fn renderTokenOffset(
             return renderToken(tree, stream, token_index + 1, indent, start_col, Space.Newline);
         },
         else => {
-            if (tree.tokens.at(token_index + 2).id == Token.Id.MultilineStringLiteralLine) {
+            if (token_index + 2 < tree.tokens.len and tree.tokens.at(token_index + 2).id == Token.Id.MultilineStringLiteralLine) {
                 try stream.write(",");
                 return;
             } else {