try to avoid races again (cf. 8c37cb84065f and fd3a36e48b09);
Unsynchronized.setmp quick_and_dirty true
use_thys ["Common_Patterns"];
use_thys ["QuoDataType", "QuoNestedDataType", "Term", "SList",
"ABexp", "Tree", "Ordinals", "Sigma_Algebra", "Comb", "PropLog", "Com"];