Fixed bug 3541 - DisplayIndex out of bounds in SDL_SetWindowPosition Intellectual Kitty In SDL_video.c, on line #1756, in SDL_SetWindowPosition (from today's distribution, 12-31-2016, https://hg.libsdl.org/SDL/shortlog/bf19e0c84483): if (displayIndex > _this->num_displays) { should be: if (displayIndex >= _this->num_displays) {