From e584dd806259f37fc17bedbd4d0fb33b936747f6 Mon Sep 17 00:00:00 2001
From: Tw <tw19881113@gmail.com>
Date: Mon, 15 May 2023 09:51:00 +0800
Subject: [PATCH] std.mem.zeroInit: zero hidden padding for extern struct

Signed-off-by: Tw <tw19881113@gmail.com>
---
 lib/std/mem.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index aae5c1b617..512a3d7ca3 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -437,7 +437,7 @@ pub fn zeroInit(comptime T: type, init: anytype) T {
                         }
                     }
 
-                    var value: T = undefined;
+                    var value: T = if (struct_info.layout == .Extern) zeroes(T) else undefined;
 
                     inline for (struct_info.fields, 0..) |field, i| {
                         if (field.is_comptime) {