[isabelle-dev] Fwd: [isabelle] Pending sort hypotheses
makarius at sketis.net
Fri Jul 6 14:56:00 CEST 2012
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
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
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.
More information about the isabelle-dev