From eff2c42ce814c71a8b2a8329ffe32c20b0ddcd03 Mon Sep 17 00:00:00 2001
From: alpharush <0xalpharush@protonmail.com>
Date: Mon, 6 Nov 2023 13:55:52 -0600
Subject: [PATCH] fix: prevent potential UB by deriving repr C for union

---
 lib/vm/src/vmcontext.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/vm/src/vmcontext.rs b/lib/vm/src/vmcontext.rs
index dcb5b0cd699..520d100d215 100644
--- a/lib/vm/src/vmcontext.rs
+++ b/lib/vm/src/vmcontext.rs
@@ -23,6 +23,7 @@ use wasmer_types::RawValue;
 /// It may either be a pointer to the [`VMContext`] if it's a Wasm function
 /// or a pointer to arbitrary data controlled by the host if it's a host function.
 #[derive(Copy, Clone, Eq)]
+#[repr(C)]
 pub union VMFunctionContext {
     /// Wasm functions take a pointer to [`VMContext`].
     pub vmctx: *mut VMContext,