[gcc r14-8744] libstdc++: Fix invalid order in PSTL inplace_merge test [PR90276]

[gcc r14-8744] libstdc++: Fix invalid order in PSTL inplace_merge test [PR90276]

[Jonathan Wakely]

https://gcc.gnu.org/g:a6286584e5536d1853a851b8c2ac3196956e3068

commit r14-8744-ga6286584e5536d1853a851b8c2ac3196956e3068
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Feb 1 10:06:15 2024 +0000

    libstdc++: Fix invalid order in PSTL inplace_merge test [PR90276]
    
    This looks like a typo in the upstream test that causes a failure in
    debug mode. It has been reported upstream.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/90276
            * testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc: Fix
            comparison function to use less-than instead of equality.

Diff:
---
 libstdc++-v3/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc b/libstdc++-v3/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc
index 576f22423b88..a9205553574a 100644
--- a/libstdc++-v3/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc
+++ b/libstdc++-v3/testsuite/25_algorithms/pstl/alg_merge/inplace_merge.cc
@@ -160,7 +160,7 @@ main()
     test_by_type<MemoryChecker>(
         [](std::size_t idx){ return MemoryChecker{std::int32_t(idx * 2)}; },
         [](std::size_t idx){ return MemoryChecker{std::int32_t(idx * 2 + 1)}; },
-        [](const MemoryChecker& val1, const MemoryChecker& val2){ return val1.value() == val2.value(); });
+        [](const MemoryChecker& val1, const MemoryChecker& val2){ return val1.value() < val2.value(); });
     EXPECT_FALSE(MemoryChecker::alive_objects() < 0, "wrong effect from inplace_merge: number of ctors calls < num of dtors calls");
     EXPECT_FALSE(MemoryChecker::alive_objects() > 0, "wrong effect from inplace_merge: number of ctors calls > num of dtors calls");