File sonnet-spellcheckdecorator.patch of Package sonnet

diff -Pdpru sonnet-5.116.0.orig/src/ui/spellcheckdecorator.cpp sonnet-5.116.0/src/ui/spellcheckdecorator.cpp
--- sonnet-5.116.0.orig/src/ui/spellcheckdecorator.cpp	2024-05-04 14:43:54.000000000 +0300
+++ sonnet-5.116.0/src/ui/spellcheckdecorator.cpp	2026-01-17 18:16:59.552411132 +0300
@@ -43,7 +43,9 @@ public:
         m_textEdit->viewport()->installEventFilter(q);
     }
 
-    ~SpellCheckDecoratorPrivate()
+    ~SpellCheckDecoratorPrivate() = default;
+
+    void removeEventFilters()
     {
         if (m_plainTextEdit) {
             m_plainTextEdit->removeEventFilter(q);
@@ -55,6 +57,12 @@ public:
         }
     }
 
+    void onParentDestroyed()
+    {
+        m_plainTextEdit = nullptr;
+        m_textEdit = nullptr;
+    }
+
     bool onContextMenuEvent(QContextMenuEvent *event);
     void execSuggestionMenu(const QPoint &pos, const QString &word, const QTextCursor &cursor);
     void createDefaultHighlighter();
@@ -223,15 +231,24 @@ SpellCheckDecorator::SpellCheckDecorator
     : QObject(textEdit)
     , d(std::make_unique<SpellCheckDecoratorPrivate>(this, textEdit))
 {
+    connect(textEdit, &QObject::destroyed, this, [this] {
+        d->onParentDestroyed();
+    });
 }
 
 SpellCheckDecorator::SpellCheckDecorator(QPlainTextEdit *textEdit)
     : QObject(textEdit)
     , d(std::make_unique<SpellCheckDecoratorPrivate>(this, textEdit))
 {
+    connect(textEdit, &QObject::destroyed, this, [this] {
+        d->onParentDestroyed();
+    });
 }
 
-SpellCheckDecorator::~SpellCheckDecorator() = default;
+SpellCheckDecorator::~SpellCheckDecorator()
+{
+    d->removeEventFilters();
+}
 
 void SpellCheckDecorator::setHighlighter(Highlighter *highlighter)
 {