test_feature_set.m:013: Error: this module must be compiled in a grade that
test_feature_set.m:013:   supports memoisation.
test_feature_set.m:013: Error: this module must be compiled in a grade that
test_feature_set.m:013:   supports trailing.
test_feature_set.m:013:   Grades that support trailing contain the grade
test_feature_set.m:013:   modifier `tr'.
test_feature_set.m:013: Error: this module must be compiled in a grade that
test_feature_set.m:013:   uses single precision floats.
test_feature_set.m:013:   Grades that use single precision floats contain the
test_feature_set.m:013:   grade modifier `spf'.