From 1eb2b97db74f21ef8f8a85802b376463fe2f6c0d Mon Sep 17 00:00:00 2001
From: Fusion <denis.fumac@gmail.com>
Date: Thu, 14 Jul 2022 21:29:24 +0200
Subject: [PATCH] Fix access after delete of workspace folders when deleting
 parent and child

---
 IDE/src/ui/ProjectPanel.bf | 30 ++++++++++++++++++++++++++----
 1 file changed, 26 insertions(+), 4 deletions(-)

diff --git a/IDE/src/ui/ProjectPanel.bf b/IDE/src/ui/ProjectPanel.bf
index ec17bf88..0f1ee302 100644
--- a/IDE/src/ui/ProjectPanel.bf
+++ b/IDE/src/ui/ProjectPanel.bf
@@ -1798,12 +1798,34 @@ namespace IDE.ui
 						if (mListViewToProjectMap.TryGetValue(projectListViewItem, let projectItem))
 							mProjectToWorkspaceFolderMap.Remove(projectItem);
 		            }
+
+					HashSet<void*> deletedFolders = scope .();
+					bool HasDeletedParent(WorkspaceFolder folder)
+					{
+						WorkspaceFolder parent = folder;
+						repeat
+						{
+							parent = parent.mParent;
+
+							if (deletedFolders.Contains(Internal.UnsafeCastToPtr(parent)))
+								return true;
+						}
+						while (parent != null);
+
+						return false;
+					}
+
 		            for (let folder in foldersToDelete)
 		            {
-		                let folderItem = folder.mListView;
-		                mListViewToWorkspaceFolderMap.Remove(folderItem);
-		                folderItem.mParentItem.RemoveChildItem(folderItem);
-		                gApp.mWorkspace.mWorkspaceFolders.Remove(folder);
+						if (!HasDeletedParent(folder))
+						{
+							let folderItem = folder.mListView;
+							mListViewToWorkspaceFolderMap.Remove(folderItem);
+							folderItem.mParentItem.RemoveChildItem(folderItem);
+						}
+
+		               	gApp.mWorkspace.mWorkspaceFolders.Remove(folder);
+						deletedFolders.Add(Internal.UnsafeCastToPtr(folder));
 		                delete folder;
 		            }