From fb485986eb64e01e6d60398ee1024d118bd3a698 Mon Sep 17 00:00:00 2001
From: Alex Szpakowski <slime73@gmail.com>
Date: Sun, 30 Sep 2018 11:26:41 -0300
Subject: [PATCH] macOS: Fix a crash when the video subsystem quits, if
 SDL_MAC_NO_SANDBOX was defined when SDL was compiled.

---
 src/video/cocoa/SDL_cocoamousetap.m | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/video/cocoa/SDL_cocoamousetap.m b/src/video/cocoa/SDL_cocoamousetap.m
index 05a7d77d8afbf..aa4f152e6acab 100644
--- a/src/video/cocoa/SDL_cocoamousetap.m
+++ b/src/video/cocoa/SDL_cocoamousetap.m
@@ -237,6 +237,13 @@
     SDL_MouseEventTapData *tapdata = (SDL_MouseEventTapData*)driverdata->tapdata;
     int status;
 
+    if (tapdata == NULL) {
+        /* event tap was already cleaned up (possibly due to CGEventTapCreate
+         * returning null.)
+         */
+        return;
+    }
+
     /* Ensure that the runloop has been started first.
      * TODO: Move this to InitMouseEventTap, check for error conditions that can
      * happen in Cocoa_MouseTapThread, and fall back to the non-EventTap way of