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

Index: src/qt-console/restore/brestore.cpp
--- src/qt-console/restore/brestore.cpp.orig
+++ src/qt-console/restore/brestore.cpp
@@ -162,7 +162,7 @@ void bRestore::displayFiles(int64_t pathid, QString pa
          if (m_path == "/") {
             m_path = "";
          } else {
-            m_path.remove(QRegExp("[^/]+/$"));
+            m_path.remove(QRegularExpression("[^/]+/$"));
          }
 
       } else if (path == "/" && m_path == "") {
