From a991c0173162bff1620705744dc8faba11136b01 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@glfw.org>
Date: Wed, 22 Jun 2016 14:36:46 +0200
Subject: [PATCH] Fail sharing if either window is context-less

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

diff --git a/src/window.c b/src/window.c
index 113ed80f..70eb3283 100644
--- a/src/window.c
+++ b/src/window.c
@@ -151,7 +151,8 @@ GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
 
     if (ctxconfig.share)
     {
-        if (ctxconfig.share->context.client == GLFW_NO_API)
+        if (ctxconfig.client == GLFW_NO_API ||
+            ctxconfig.share->context.client == GLFW_NO_API)
         {
             _glfwInputError(GLFW_NO_WINDOW_CONTEXT, NULL);
             return NULL;