From f64abbd016a918fe6e74e0cf337410cecad5eb5d Mon Sep 17 00:00:00 2001
From: Isaac Freund <mail@isaacfreund.com>
Date: Mon, 11 Jul 2022 23:33:34 +0200
Subject: [PATCH] common: make Array.slice() helper safer

---
 src/common_core.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/common_core.zig b/src/common_core.zig
index 318aef1..f234496 100644
--- a/src/common_core.zig
+++ b/src/common_core.zig
@@ -34,7 +34,8 @@ pub const Array = extern struct {
 
     pub fn slice(array: Array, comptime T: type) []T {
         const data = array.data orelse return &[0]T{};
-        const ptr = @ptrCast([*]T, @alignCast(@alignOf(T), data));
+        // The wire protocol/libwayland only guarantee 32-bit word alignment.
+        const ptr = @ptrCast([*]T, @alignCast(4, data));
         return ptr[0..@divExact(array.size, @sizeOf(T))];
     }
 };