From e02ee7d5f11b31024e1fe91cf980a90641b1a2c4 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Thu, 5 May 2022 10:21:50 +0200
Subject: Add check against null pointer occurrence reported with Gmsh (Issue
 #434).

---
 src/Fl_cocoa.mm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 33e78feee..1fe7f68cc 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -2284,6 +2284,7 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
   FLWindow *cw = (FLWindow*)[self window];
   Fl_Window *window = [cw getFl_Window];
   if (!window) return; // may happen after closing full-screen window
+  if (!Fl_X::i(window)) return; // reported to happen with Gmsh (issue #434)
   fl_lock_function();
   Fl_Cocoa_Window_Driver *d = Fl_Cocoa_Window_Driver::driver(window);
   if (!through_Fl_X_flush
-- 
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