The x86 Gentoo Refleaks 3.x report that test_sys_setprofile is potentially leaking referenecs:

https://buildbot.python.org/all/#/builders/1/builds/292

----------------------------------------------------------------------
Ran 21 tests in 0.007s
OK
.
test_sys_setprofile leaked [1, 1, 1] references, sum=3
1 test failed again:
    test_sys_setprofile
== Tests result: FAILURE then FAILURE ==
408 tests OK.
10 slowest tests:
- test_asyncio: 28 min 19 sec
- test_concurrent_futures: 23 min 10 sec
- test_multiprocessing_spawn: 22 min 1 sec
- test_multiprocessing_forkserver: 11 min 24 sec
- test_multiprocessing_fork: 8 min 35 sec
- test_lib2to3: 6 min 39 sec
- test_zipfile: 6 min 21 sec
- test_decimal: 6 min 18 sec
- test_io: 5 min 44 sec
- test_gdb: 5 min 39 sec
1 test failed:
    test_sys_setprofile
8 tests skipped:
    test_devpoll test_kqueue test_msilib test_startfile
    test_winconsoleio test_winreg test_winsound test_zipfile64
1 re-run test:
    test_sys_setprofile
Total duration: 2 hour 10 min
Tests result: FAILURE then FAILURE