Clang 19 -std=c++23 complained that ITERATIONS_PER_THREAD was captured, but not used, so 668d81f73a5c2f4ec14764d1892f2eaf6494c0f1 dropped it, after making the variable constexpr. Picking that change back to older branches, we found that MSVC (14.29?) complains that it's _not_ captured anymore: tst_qpointer.cpp(491): error C3493: 'ITERATIONS_PER_THREAD' cannot be implicitly captured because no default capture mode has been specified To appease both compilers, and cover the maximum range of C++ standard editions, use implicit [&] capture, which should work everywhere. Not picking to 6.5, because the cherry-pick of 668d81f73a5c2f4ec14764d1892f2eaf6494c0f1 already had to make that change in order to pass CI. Pick-to: 6.10 6.9 6.8 Change-Id: Iacbd53d3904608e8c9cd73edf31ba7924fd508e6 Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>