From 31762a81734301e620f4f075a7ddaf41ab8f9de7 Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Thu, 3 Feb 2022 12:04:11 +0100
Subject: [PATCH] Docking: fixed potential crash if a passthrough dock node is
 submitted without a child intermediate (currently not possible via API)

---
 imgui.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/imgui.cpp b/imgui.cpp
index 3e17a3871..614016bbb 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -14979,7 +14979,8 @@ static void ImGui::DockNodeUpdate(ImGuiDockNode* node)
         if (central_node_hole && !hole_rect.IsInverted())
         {
             SetWindowHitTestHole(host_window, hole_rect.Min, hole_rect.Max - hole_rect.Min);
-            SetWindowHitTestHole(host_window->ParentWindow, hole_rect.Min, hole_rect.Max - hole_rect.Min);
+            if (host_window->ParentWindow)
+                SetWindowHitTestHole(host_window->ParentWindow, hole_rect.Min, hole_rect.Max - hole_rect.Min);
         }
     }