From b5d385824db2f204527713d6d6ad02c24a9ccef8 Mon Sep 17 00:00:00 2001
From: omar <omarcornut@gmail.com>
Date: Thu, 14 Jun 2018 15:02:43 +0200
Subject: [PATCH] Added assert in TreePop() to ease catching ID stack underflow
 earlier.

---
 imgui.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/imgui.cpp b/imgui.cpp
index e779356f2..beefcfcd7 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -13323,6 +13323,7 @@ void ImGui::TreePop()
         }
     window->DC.TreeDepthMayJumpToParentOnPop &= (1 << window->DC.TreeDepth) - 1;
 
+    IM_ASSERT(window->IDStack.Size > 1); // There should always be 1 element in the IDStack (pushed during window creation). If this triggers you called TreePop/PopID too much.
     PopID();
 }