bacula-15.0.3-qt6-gentoo.patch from https://dev.gentoo.org/~tomjbe/distfiles/

Index: src/qt-console/tray-monitor/fileselectwizardpage.cpp
--- src/qt-console/tray-monitor/fileselectwizardpage.cpp.orig
+++ src/qt-console/tray-monitor/fileselectwizardpage.cpp
@@ -237,7 +237,7 @@ void FileSelectWizardPage::changeCurrentFolder(const Q
                     if (m_currentPathStr == "/") {
                         m_currentPathStr = "";
                     } else {
-                        m_currentPathStr.remove(QRegExp("[^/]+/$"));
+                        m_currentPathStr.remove(QRegularExpression("[^/]+/$"));
                     }
 
                 } else if (path == "/" && m_currentPathStr == "") {
