False positive with cxx_lt_to_le

[correaa]

I find a false positive when Replaced < with <= [cxx_lt_to_le].

This is erroneously reported here: https://gitlab.com/correaa/boost-multi/-/jobs/9043407243#L1886
When I manually do the replacement at that line the test (correctly) fail.

[info] Survived mutants (1/75):
/builds/correaa/boost-multi/include/boost/multi/detail/index_range.hpp:214:112: warning: Survived: Replaced < with <= [cxx_lt_to_le]
	template<class Value> [[nodiscard]] constexpr auto contains(Value const& value) const -> bool { return (value < last_) && (first_ <= value); }

To reproduce I do

$ CXX=clang++-16 cmake .. -DCMAKE_CXX_FLAGS="-O1 -fpass-plugin=/usr/lib/mull-ir-frontend-16 -g -grecord-command-line -fprofile-instr-generate -fcoverage-mapping"
$ cmake --build . --parallel 2
$ cd test
$ ls *.x | xargs -n 1 sh -c 'echo $0 && ((mull-runner-16 --ld-search-path=/usr/lib/x86_64-linux-gnu $0 -test-program=ctest -- -j2 --stop-on-failure) || exit 255)'

This mutation should be covered at least by these tests in test/index_range.cpp, it is almost a textbook example of testing coverage.

		multi::range<int> const irng{5, 12};

		BOOST_TEST( !irng.contains( 4) );
		BOOST_TEST(  irng.contains( 5) );
		BOOST_TEST(  irng.contains( 6) );

		BOOST_TEST(  irng.contains(10) );
		BOOST_TEST(  irng.contains(11) );

		BOOST_TEST( !irng.contains(12) );
		BOOST_TEST( !irng.contains(13) );

Thank you again for the tool

I am using mull-16, I am stuck with 16 because 17 was producing a segfault or something like that (I have to try again).

[correaa]

It doesn't seem to be deterministic even. I ran the CI again (with no changes), and it passed this time.