From d401a50e0a13710561e3fa2129c53da0a9b6c4aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Szymon=20Aceda=C5=84ski?= <accek@mimuw.edu.pl>
Date: Sat, 25 Feb 2017 14:42:40 +0100
Subject: [PATCH] Fix crash on Mac OS X when FG does not finish input init

---
 src/Input/FGMacOSXEventInput.cxx | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/Input/FGMacOSXEventInput.cxx b/src/Input/FGMacOSXEventInput.cxx
index 517322e17..b8d7168fe 100644
--- a/src/Input/FGMacOSXEventInput.cxx
+++ b/src/Input/FGMacOSXEventInput.cxx
@@ -229,9 +229,11 @@ void FGMacOSXEventInput::shutdown()
 {
     FGEventInput::shutdown();
 
-    IOHIDManagerClose(d->hidManager, kIOHIDOptionsTypeNone);
-    IOHIDManagerUnscheduleFromRunLoop(d->hidManager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
-    CFRelease(d->hidManager);
+    if (d->hidManager) {
+      IOHIDManagerClose(d->hidManager, kIOHIDOptionsTypeNone);
+      IOHIDManagerUnscheduleFromRunLoop(d->hidManager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
+      CFRelease(d->hidManager);
+    }
 }
 
 //