--- a/src/Pure/thm.ML Sat Aug 10 17:09:20 2019 +0200+++ b/src/Pure/thm.ML Sun Aug 11 22:36:34 2019 +0200@@ -382,7 +382,6 @@ fun insert_constraints thy (T, S) = let val ignored =- ! Proofterm.proofs < 1 orelse S = [] orelse (case T of TFree (_, S') => S = S'