trap failure to metta_to_metta_macro and compile_for_assert_3

Author: TeamSPoon

prolog/metta_lang/metta_compiler.pl

@@ -408,8 +408,9 @@
   compile_for_assert_2(HeadIsIn, AsBodyFnIn, Converted).
 
 compile_for_assert_2(HeadIsIn, AsBodyFnIn, Converted) :-
+  must_det_lls((
   metta_to_metta_macro(HeadIsIn, AsBodyFnIn, HeadIs, AsBodyFn),
-  compile_for_assert_3(HeadIs, AsBodyFn, Converted).
+  compile_for_assert_3(HeadIs, AsBodyFn, Converted))).
 
 compile_for_assert_3(HeadIsIn, AsBodyFnIn, Converted) :-
    %must_det_lls((