From 678cbdc786168b1152ff8383591f616a7e1eef24 Mon Sep 17 00:00:00 2001
From: Tomasz Kurcz <uint@lavabit.com>
Date: Wed, 5 Oct 2022 11:05:39 +0200
Subject: [PATCH] Seal `HostFunctionKind`

---
 lib/api/src/sys/externals/function.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/api/src/sys/externals/function.rs b/lib/api/src/sys/externals/function.rs
index 1b90a43c462..8392e9b4203 100644
--- a/lib/api/src/sys/externals/function.rs
+++ b/lib/api/src/sys/externals/function.rs
@@ -1105,7 +1105,7 @@ mod inner {
     /// the trait system to automatically generate the appropriate
     /// host functions.
     #[doc(hidden)]
-    pub trait HostFunctionKind {}
+    pub trait HostFunctionKind: private::HostFunctionKindSealed {}
 
     /// An empty struct to help Rust typing to determine
     /// when a `HostFunction` does have an environment.