From 3e720d2a80e00a962f2489bc4a5f54d4e84a76e9 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 18 Jun 2019 13:41:38 -0700
Subject: [PATCH] Fixed potential double-free in mouse cleanup code

---
 src/video/cocoa/SDL_cocoamouse.m | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/video/cocoa/SDL_cocoamouse.m b/src/video/cocoa/SDL_cocoamouse.m
index b774626a3933e..c257be02e9657 100644
--- a/src/video/cocoa/SDL_cocoamouse.m
+++ b/src/video/cocoa/SDL_cocoamouse.m
@@ -348,10 +348,9 @@ + (NSCursor *)invisibleCursor
 
     Cocoa_InitMouseEventTap(mouse->driverdata);
 
-    SDL_MouseData *driverdata = (SDL_MouseData*)mouse->driverdata;
     const NSPoint location =  [NSEvent mouseLocation];
-    driverdata->lastMoveX = location.x;
-    driverdata->lastMoveY = location.y;
+    mouse->driverdata->lastMoveX = location.x;
+    mouse->driverdata->lastMoveY = location.y;
 }
 
 void
@@ -482,9 +481,10 @@ + (NSCursor *)invisibleCursor
     if (mouse) {
         if (mouse->driverdata) {
             Cocoa_QuitMouseEventTap(((SDL_MouseData*)mouse->driverdata));
-        }
 
-        SDL_free(mouse->driverdata);
+            SDL_free(mouse->driverdata);
+            mouse->driverdata = NULL;
+        }
     }
 }