Enabled stack-use-after-return (Linux/Darwin) and leak-detection (Linux).  Smoke logs available at http://m-l.org/~perl/smoke/perl/darwin-thread-multi-2level/blead_clang_quick_sanitize=address/log6806ac9dc94198e1b243291170692afd3e7785f5.log.gz

Automated smoke report for branch blead 5.41.8 patch 6806ac9dc94198e1b243291170692afd3e7785f5 v5.41.7-35-g6806ac9dc9
iTunes-MacBook-Air-Ethernet.local: MacBook Air (2 GHz) (Intel Core i7/1 cpu[2 cores])
    on        darwin - 18.7.0)
    using     cc version 4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.17)
    smoketime 12 hours 3 minutes (average 40 minutes 11 seconds)

Summary: FAIL(F)

O = OK  F = Failure(s), extended report at the bottom
X = Failure(s) under TEST but not under harness
? = still running or test results not (yet) available
Build failures during:       - = unknown or N/A
c = Configure, m = make, M = make (after miniperl), t = make test-prep

v5.41.7-35-g6806ac9dc9  Configuration (common) none
----------- ---------------------------------------------------------
O O         -Uuseperlio
O O         
O O         -Duse64bitint
O O         -Duselongdouble
O O         -Dusemorebits
O O         -Duseithreads
F O         -Duseithreads -Duse64bitint
O O         -Duseithreads -Duselongdouble
O O         -Duseithreads -Dusemorebits
| +--------- -DDEBUGGING
+----------- no debugging


Testsuite was run only with 'harness'

Failures: (common-args) none
[default] -Duseithreads -Duse64bitint
../dist/threads/t/blocks.t..................................??????

MANIFEST did not declare '.mailmap'

Passed Todo tests: (common-args) none
[default] -Uuseperlio
[default] 
[default] -Duse64bitint
[default] -Duselongdouble
[default] -Dusemorebits
[default] -Duseithreads
[default] -Duseithreads -Duse64bitint
[default] -Duseithreads -Duselongdouble
[default] -Duseithreads -Dusemorebits
../t/run/todo.t.............................................PASSED
    3-4
(See log because mailing list size limit is too small.)
Non-Fatal messages(gcc):

-- 
Report by Test::Smoke v1.72 running on perl 5.18.4
(Reporter v0.053 / Smoker v0.046)