[BUG] some tests segfault sporadically on OSX

Describe the bug

System Which OS, compiler, and compiler version are you using:

• OS: OSX (bigsur)
• Compiler and version: Apple Clang 13.0.0

To reproduce

1. at HEAD
2. cmake --build "build" --config Debug
3. cmake -E chdir "build" ctest ---build-config Debug

Expected behavior All tests should pass at HEAD

Actual behavior The following tests FAILED: 47 - register_benchmark_test (SEGFAULT) 59 - user_counters_tabular_test (SEGFAULT)

Keep re-running the tests (step 3), one or both of them could pass occasionally. There seems to be some level of indeterminism here but I haven't been able to track down.