From 787d521f52ea8316668bcc2653f986dfda3d5228 Mon Sep 17 00:00:00 2001
From: Antti Soininen <antti.soininen@vtt.fi>
Date: Wed, 16 Oct 2024 12:47:26 +0300
Subject: [PATCH] Plug memory leak

Better setting document in editor to None instead of instantiating
a QTextDocument without parent.
---
 spinetoolbox/widgets/code_text_edit.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/spinetoolbox/widgets/code_text_edit.py b/spinetoolbox/widgets/code_text_edit.py
index cc115f7db..f8524d7e8 100644
--- a/spinetoolbox/widgets/code_text_edit.py
+++ b/spinetoolbox/widgets/code_text_edit.py
@@ -65,10 +65,11 @@ def setPlainText(self, text):
         self.setDocument(doc)
 
     def setDocument(self, doc):
-        doc.setDocumentLayout(QPlainTextDocumentLayout(doc))
+        if doc is not None:
+            doc.setDocumentLayout(QPlainTextDocumentLayout(doc))
+            doc.setDefaultFont(self.font())
         super().setDocument(doc)
         self._highlighter.setDocument(doc)
-        doc.setDefaultFont(self.font())
         self.setTabStopDistance(QFontMetrics(self.font()).horizontalAdvance(4 * " "))
 
     def line_number_area_width(self):