From 7dd7cfcf953a01f13c378bd110964ce1c4dc82a6 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Thu, 12 Jan 2023 21:28:03 +0100
Subject: Wayland Fix "Error "heap-use-after-free" when scaling twice" (#650)

---
 src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
index a62bce6d2..2edc4a66e 100644
--- a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
@@ -477,9 +477,10 @@ void Fl_Wayland_Window_Driver::hide() {
         wl_list_remove(&window_output->link);
         free(window_output);
     }
+    if (Fl_Wayland_Window_Driver::wld_window == wld_win) Fl_Wayland_Window_Driver::wld_window = NULL;
 //fprintf(stderr, "After hide: sub=%p frame=%p xdg=%p top=%p pop=%p surf=%p\n", wld_win->subsurface,  wld_win->frame, wld_win->xdg_surface, wld_win->xdg_toplevel, wld_win->xdg_popup, wld_win->wl_surface);
+    free(wld_win);
   }
-  free(wld_win);
   if (pWindow->as_gl_window() && in_flush) {
     ip->xid = 0;
     ip->next = NULL; // to end the loop in calling Fl::flush()
-- 
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