In file included from fts-backend-xapian.cpp:64:
322fts-backend-xapian-functions.cpp: In function 'int fts_backend_xapian_set_path(xapian_fts_backend*)':
323fts-backend-xapian-functions.cpp:871:64: warning: missing sentinel in function call [-Wformat=]
324 871 | backend->path = i_strconcat(path, "/" XAPIAN_FILE_PREFIX, NULL);
325 | ^
Without it I get: