[Bug testsuite/79051] New: FAIL: gcc.dg/attr-alloc_size-4.c (test for warnings, line 140)

["msebor at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79051

            Bug ID: 79051
           Summary: FAIL: gcc.dg/attr-alloc_size-4.c  (test for warnings,
                    line 140)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: msebor at gcc dot gnu.org
  Target Milestone: ---

As mentioned in bug 78775, comment 8, on powerpc64 and powerpc64le the
gcc.dg/attr-alloc_size-4.c test fails the assertion on line 140 (an expected
warning is not issued).  Interestingly, the comment shows excess errors but my
run does not.  All I get on both is

FAIL: gcc.dg/attr-alloc_size-4.c  (test for warnings, line 140)

                === gcc Summary ===

# of expected passes            25
# of unexpected failures        1

I'm also having trouble isolating the failure into a small test case
independent of the attr-alloc_size-4.c test.