From d32bafc6e1879e4a0d27d3fead97404c266a530e Mon Sep 17 00:00:00 2001
From: Dustin Howett <duhowett@microsoft.com>
Date: Tue, 10 Apr 2018 12:04:08 -0700
Subject: [PATCH] Let go of the runtime lock properly in class_setSuperclass

---
 runtime.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/runtime.c b/runtime.c
index 926bd06..7b0ebd5 100644
--- a/runtime.c
+++ b/runtime.c
@@ -526,7 +526,10 @@ Class class_setSuperclass(Class cls, Class newSuper)
 
 	LOCK_RUNTIME();
 
-	if (cls->super_class == newSuper) { return newSuper; }
+	if (cls->super_class == newSuper) {
+		UNLOCK_RUNTIME();
+		return newSuper;
+	}
 
 	safe_remove_from_subclass_list(cls);
 	objc_resolve_class(newSuper);