[bug #53152] Intermittent timeout running regression test features/output_sync

[Paul D. Smith]

Follow-up Comment #4, bug #53152 (project make):

I see the issue; thanks for the explanation Michael.  In some ways this is
more of a test artifact than something likely to appear in a real makefile,
although I think it really is a bug in make's logic.

In a real makefile it's highly unlikely that two recipes will have this sort
of relationship (one recipe waits for an artifact of another recipe to be
created) without declaring any kind of prerequisite relationship in the
makefile.

So this should be fixed but I don't think it's critical and the fix will take
a good bit of thought and perhaps some fiddling to get right.

If there are issues with the test failing in some build environments I think
an appropriate short-term fix is to comment out these regression tests that
may fail.

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