https://codereview.qt-project.org/c/qt/qtbase/+/735182
https://qt-project.atlassian.net/browse/QTBUG-146670
(seems to also affect ppc32)
--- a/src/corelib/kernel/qtestsupport_core.cpp
+++ b/src/corelib/kernel/qtestsupport_core.cpp
@@ -9,8 +9,4 @@
 using namespace std::chrono_literals;
 
-// Assert that this instantiation of std::atomic is always lock-free so we
-// know that no code will execute on destruction.
-static_assert(std::atomic<std::chrono::milliseconds>::is_always_lock_free);
-
 QT_BEGIN_NAMESPACE