PBC fix bundle #2029

Job	Run time
macos-latest: clang++ Release Threads	14m 34s
macos-latest: clang++ Release OneTBB	2m 56s
macos-latest: clang++ Release PaRSEC	2m 53s
ubuntu-20.04: /usr/bin/g++-9 Release Threads	36m 6s
ubuntu-20.04: /usr/bin/g++-9 Release OneTBB	2m 5s
ubuntu-20.04: /usr/bin/g++-9 Release PaRSEC	1m 57s
macos-latest: clang++ Debug Threads	22m 3s
macos-latest: clang++ Debug OneTBB	2m 55s
macos-latest: clang++ Debug PaRSEC	3m 17s
ubuntu-20.04: /usr/bin/g++-9 Debug Threads	48m 8s
ubuntu-20.04: /usr/bin/g++-9 Debug OneTBB	1m 48s
ubuntu-20.04: /usr/bin/g++-9 Debug PaRSEC	2m 1s
	2h 20m 43s

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