keep Local_Theory.reset for now -- still required in many AFP sessions (amending 1c201e4792cb);
--- a/src/Pure/Isar/toplevel.ML Tue Jan 22 13:57:01 2019 +0100
+++ b/src/Pure/Isar/toplevel.ML Tue Jan 22 15:29:22 2019 +0100
@@ -749,5 +749,6 @@
end;
end;
-
+(* FIXME
structure Local_Theory : LOCAL_THEORY = struct open Local_Theory; end;
+*)