Thanks for investigating. Although he made a mistake, of course, we should deliver an intelligible error message and not simply allow an exception to propagate. Larry
On 6 Jul 2012, at 13:56, Makarius wrote: > On Tue, 3 Jul 2012, Lawrence Paulson wrote: > >> Does anybody know (without going to the trouble of reproducing this exact >> proof and obtaining a backtrace) why the function dest_equals is being >> called on a sort constraint? At a guess, something is expecting a definition. > > Henri had put the SORT_CONSTRAINT in the 'where' part of 'interpretation' and > that expects a proper equation at some point. This is also explained in the > manuals (isar-ref, locales). > > The confusion was coming from > https://lists.cam.ac.uk/mailman/htdig/cl-isabelle-users/2012-July/msg00003.html > where it looked like problem was solved. > > In most practical situations, SORT_CONSTRAINT as it is now (Isabelle2012 or > today's Isabelle/3155cee13c49) works best in assumptions. > > > Makarius _______________________________________________ isabelle-dev mailing list [email protected] https://mailmanbroy.informatik.tu-muenchen.de/mailman/listinfo/isabelle-dev
