Merge pull request #1876 from zmostafa/iox-1871-fix-unit-test-semantics-for-gccv9.4

iox-#1871 Fix aggressive loop optimizations error with gcc9.4

Author: elBoberido

doc/website/release-notes/iceoryx-unreleased.md

@@ -67,6 +67,7 @@
 - `WaitSet::wait` returns if data was send before `WaitSet::attachState(.., State::HAS_{DATA, REQUEST, RESPONSE})` [\#1855](https://github.com/eclipse-iceoryx/iceoryx/issues/1855)
 - Provide a better error message when attempting to create a shared memory in read-only mode
   [\#1821](https://github.com/eclipse-iceoryx/iceoryx/issues/1821)
+- Can not build iceoryx with gcc 9.4 [\#1871](https://github.com/eclipse-iceoryx/iceoryx/issues/1871)
 
 **Refactoring:**
 

iceoryx_hoofs/test/moduletests/test_cxx_vector.cpp

@@ -1512,7 +1512,9 @@ TEST_F(vector_test, EmplaceAtPositionAfterEndBeforeCapacityExceedsFails)
     sut.emplace_back(0U);
     sut.emplace_back(1U);
 
-    EXPECT_FALSE(sut.emplace(sut.size() + 1, 3U));
-    ASSERT_THAT(sut.size(), Eq(2U));
+    constexpr uint64_t EXPECTED_SIZE{2};
+    ASSERT_THAT(sut.size(), EXPECTED_SIZE);
+    EXPECT_FALSE(sut.emplace(EXPECTED_SIZE + 1, 3U));
+    ASSERT_THAT(sut.size(), EXPECTED_SIZE);
 }
 } // namespace