--- a/src/HOL/Tools/Function/scnp_reconstruct.ML Wed Oct 20 17:11:46 2021 +0200
+++ b/src/HOL/Tools/Function/scnp_reconstruct.ML Wed Oct 20 18:13:17 2021 +0200
@@ -63,7 +63,6 @@
(
type T = multiset_setup option
val empty = NONE
- val extend = I;
val merge = merge_options
)