From e0c3e5ccfc06bfe4b460a804dab3bc078bf4e504 Mon Sep 17 00:00:00 2001
From: Squareys <squareys@googlemail.com>
Date: Sat, 25 Aug 2018 20:47:40 +0200
Subject: [PATCH] Platform: gracefully fail GlfwApplication::exec() if no
 window was opened

Signed-off-by: Squareys <squareys@googlemail.com>
---
 src/Magnum/Platform/GlfwApplication.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Magnum/Platform/GlfwApplication.cpp b/src/Magnum/Platform/GlfwApplication.cpp
index f3b33d5a6..2b0e9baa1 100644
--- a/src/Magnum/Platform/GlfwApplication.cpp
+++ b/src/Magnum/Platform/GlfwApplication.cpp
@@ -436,6 +436,8 @@ void GlfwApplication::setSwapInterval(const Int interval) {
 }
 
 int GlfwApplication::exec() {
+    CORRADE_ASSERT(_window, "Platform::GlfwApplication::exec(): no window opened", {});
+
     while(!glfwWindowShouldClose(_window)) {
         if(_flags & Flag::Redraw) {
             _flags &= ~Flag::Redraw;