From 7277670843d259d19093c8900b1f8445e41202ae Mon Sep 17 00:00:00 2001
From: shiimizu <shiimizu@protonmail.com>
Date: Thu, 31 Oct 2019 10:23:02 -0700
Subject: [PATCH] Add error when too few arguments are provided to std.fmt

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

diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index d3d795bf9d..3c860bc595 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -167,6 +167,10 @@ pub fn format(
                 '}' => {
                     const arg_to_print = comptime nextArg(&used_pos_args, maybe_pos_arg, &next_arg);
 
+                    if (arg_to_print >= args.len) {
+                        @compileError("Too few arguments");
+                    }
+
                     try formatType(
                         args[arg_to_print],
                         fmt[0..0],