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Drop illegitimate optimisation from d5a7f2c54655.
authorballarin
Fri, 02 Mar 2018 15:14:59 +0100
changeset 67742 6306bd582957
parent 67741 d5a7f2c54655
child 67747 7b84ecd54d70
Drop illegitimate optimisation from d5a7f2c54655.
src/Pure/Isar/expression.ML file | annotate | diff | comparison | revisions 
--- a/src/Pure/Isar/expression.ML	Fri Mar 02 14:28:39 2018 +0100
+++ b/src/Pure/Isar/expression.ML	Fri Mar 02 15:14:59 2018 +0100
@@ -407,8 +407,7 @@
           |> Variable.export_terms ctxt' ctxt
           |> Element.eq_term_morphism (Proof_Context.theory_of ctxt)
           |> the_default Morphism.identity;
-       val ctxt'' = if null eqns then ctxt' else 
-         Locale.activate_declarations (loc, inst_morph $> rewrite_morph) ctxt;
+       val ctxt'' = Locale.activate_declarations (loc, inst_morph $> rewrite_morph) ctxt;
        val eqnss' = eqnss @ [attrss ~~ Variable.export_terms ctxt' ctxt eqns'];
       in (i + 1, insts', eqnss', ctxt'') end;
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