fix: fix use after free crash

Author: tringenbach

plugins/builtin/include/content/text_highlighting/pattern_language.hpp

@@ -164,7 +164,7 @@ namespace hex::plugin::builtin {
         /**
          * @brief Entry point to syntax highlighting
          */
-        void highlightSourceCode();
+        void highlightSourceCode(const std::string& text);
         void processSource();
         void clearVariables();
 

plugins/builtin/source/content/text_highlighting/pattern_language.cpp

@@ -2246,7 +2246,7 @@ namespace hex::plugin::builtin {
 
 
 // Only update if needed. Must wait for the parser to finish first.
-    void TextHighlighter::highlightSourceCode() {
+    void TextHighlighter::highlightSourceCode(const std::string& text) {
         m_wasInterrupted = false;
         ON_SCOPE_EXIT {
             if (!m_tokenColors.empty())
@@ -2298,10 +2298,7 @@ namespace hex::plugin::builtin {
             m_globalTokenRange.insert(Interval(0, m_tokens.size()-1));
 
             ui::TextEditor *editor = m_viewPatternEditor->getTextEditor();
-            if (editor != nullptr)
-                m_text = editor->getText();
-            else
-                log::warn("Text editor not found, provider is null");
+            m_text = text;
 
             if (m_text.empty() || m_text == "\n")
                 return;

plugins/builtin/source/content/views/view_pattern_editor.cpp

@@ -1435,7 +1435,9 @@ namespace hex::plugin::builtin {
                 if (m_textHighlighter.getRunningColorizers() == 0) {
                     m_textHighlighter.m_needsToUpdateColors = false;
                     m_changesWereParsed = false;
-                    TaskManager::createBackgroundTask("HighlightSourceCode", [this](auto &) { m_textHighlighter.highlightSourceCode(); });
+                      
+                    auto text = m_textEditor.get(provider).getText();
+                    TaskManager::createBackgroundTask("HighlightSourceCode", [this, text](auto &) { m_textHighlighter.highlightSourceCode(text); });
                 } else {
                     m_textHighlighter.interrupt();
                 }