diff --git a/src/libs/utils/filesearch.cpp b/src/libs/utils/filesearch.cpp
index 03aa1cf9b20..4af8079adf0 100644
--- a/src/libs/utils/filesearch.cpp
+++ b/src/libs/utils/filesearch.cpp
@@ -251,6 +251,10 @@ QRegularExpressionMatch FileSearchRegExp::doGuardedMatch(const QString &line, in
 void FileSearchRegExp::operator()(QFutureInterface<FileSearchResultList> &futureInterface,
                                   const FileIterator::Item &item) const
 {
+    if (!expression.isValid()) {
+        futureInterface.cancel();
+        return;
+    }
     if (futureInterface.isCanceled())
         return;
     futureInterface.setProgressRange(0, 1);
diff --git a/src/plugins/texteditor/texteditor.cpp b/src/plugins/texteditor/texteditor.cpp
index 397281b8b5e..59617e4b6c7 100644
--- a/src/plugins/texteditor/texteditor.cpp
+++ b/src/plugins/texteditor/texteditor.cpp
@@ -4251,7 +4251,7 @@ void TextEditorWidgetPrivate::paintSearchResultOverlay(const PaintEventData &dat
                                                        QPainter &painter) const
 {
     m_searchResultOverlay->clear();
-    if (m_searchExpr.pattern().isEmpty())
+    if (m_searchExpr.pattern().isEmpty() || !m_searchExpr.isValid())
         return;
 
     const int margin = 5;