PBC fix bundle #2017

Job	Run time
macos-latest: clang++ Release Threads	13m 5s
macos-latest: clang++ Release OneTBB	1m 48s
macos-latest: clang++ Release PaRSEC	2m 15s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	35m 55s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	1m 47s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	2m 47s
macos-latest: clang++ Debug Threads	20m 48s
macos-latest: clang++ Debug OneTBB	1m 51s
macos-latest: clang++ Debug PaRSEC	2m 6s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	48m 47s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 42s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 46s
	2h 15m 37s

Provide feedback