commit 0925e77d0eff9ccd94d898df58cd371979ecc589
author Sylvain Becker <sylvain.becker@gmail.com> Sun Jan 10 22:21:12 2021 +0100
committer Sylvain Becker <sylvain.becker@gmail.com> Sun Jan 10 22:21:12 2021 +0100
tree 37361f9a3bd2808b9d55817ef1ca5236e10dd705
parent 770b4be1707c8f9a1a4f9e407a979d0ed7e9bd9f

Fixed bug 5465 - Invalid memcpy inside SDL_GestureDelTouch (Thanks dmikushin and Yuki Okumura)

src/events/SDL_gesture.c

diff --git a/src/events/SDL_gesture.c b/src/events/SDL_gesture.c
index 9da9dd4..c85b8dc 100644
--- a/src/events/SDL_gesture.c
+++ b/src/events/SDL_gesture.c
@@ -487,7 +487,9 @@
     SDL_zero(SDL_gestureTouch[i]);
 
     SDL_numGestureTouches--;
-    SDL_memcpy(&SDL_gestureTouch[i], &SDL_gestureTouch[SDL_numGestureTouches], sizeof(SDL_gestureTouch[i]));
+    if (i != SDL_numGestureTouches) {
+        SDL_memcpy(&SDL_gestureTouch[i], &SDL_gestureTouch[SDL_numGestureTouches], sizeof(SDL_gestureTouch[i]));
+    }
     return 0;
 }