[m-rev.] for review: avoid test failures in hlc grades with GCC 12

[Zoltan Somogyi]

2022-07-02 02:37 GMT+10:00 "Julien Fischer" <jfischer at opturion.com>:
> The failing tests were the following (all from tests/valid):
> 
>     higher_order5
>     loop_in_disj
>     mode_syntax
>     recursive_no_tag_type
>     same_length_2
>     stack_alloc

The same_length_2 test case should not be fixed; it should be
*deleted*. It is almost identical to mode_syntax.m, and it tests
mode syntax, in just a very slightly different way than mode_syntax.m.
So the predicate q from mode_syntax.m should be moved to
mode_syntax.m after being renamed.

Since the predicate definitions are irrelevant to what mode_syntax.m
is intended to test, I think the infinite recursion warning should be
switched off for it specifically.

In both higher_order5 and recursive_no_tag_type, it should be
possible to add extra arguments to the now-infinite-loop predicates
to avoid the infinite loop, but if this turns out to be too complicated,
then again, the warning should be switch off for them specifically.

For loop_in_disj and stack_alloc, I have no idea what they are testing,
and "git log" can't tell me either. I would look it up in the CVS repository,
but I would have to find it first :-( In stack_alloc's case, adding an extra
argument to p that is decremented on each call, and adding a base case
that that does nothing when it reaches zero, looks like it would preserve
whatever functionality it is trying to test. For loop_in_disj, testing
the treatment of calls with erroneous determinism seems to be at least
part of the objective, but I have no idea whether replacing the calls to
loop with a call to e.g. error would screw up the *rest* of the objective.
So again, I would switch off the warning for loop_in_disj specifically.

Zoltan.