From ee654e9217487f6fca12356ec8af82319c309592 Mon Sep 17 00:00:00 2001
From: Fox Caminiti <fox@foxcam.net>
Date: Tue, 7 Feb 2023 00:21:06 -0500
Subject: good changes

---
 src/undo.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/undo.cpp')

diff --git a/src/undo.cpp b/src/undo.cpp
index 38c22ef..c26ab1b 100644
--- a/src/undo.cpp
+++ b/src/undo.cpp
@@ -271,6 +271,7 @@ History_Purge(memory *Memory, history_entry_list *History, uint64 ActionCount_To
 
 static void History_Action_Add(memory *Memory, history_action ActionData, void *ReferenceData = NULL)
 {
+    Assert(Debug.UndoState == 1);   // This action wasn't preceded by a History_Undo_Start!
     history_entry_list *History = &Memory->History;
     history_entry *Entry = &History->Entry[History->EntryPlayhead - 1];
 
-- 
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