Uncaught Mercury exception:
Software Error: oops
Stack dump follows:
   0       pred exception.throw_impl/1-0 (erroneous) (exception.m:NNNN)
   1       pred exception.throw/1-0 (erroneous) (exception.m:NNNN)
   2       pred require.error/1-0 (erroneous) (require.m:NNNN)
   3       pred no_fully_strict.main/2-0 (det) (no_fully_strict.m:12)