This now errors on undefined behavior instead of warning.  Smoke logs available at http://m-l.org/~perl/smoke/perl/x86_64-linux-thread-multi/blead_clang_quick_sanitize=undefined/log96a66a0c2f43602873f3afcce2aac7f284578be7.log.gz

Automated smoke report for branch blead 5.43.12 patch 96a66a0c2f43602873f3afcce2aac7f284578be7 v5.43.11-4-g96a66a0c2f
sechs: AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx (AuthenticAMD 1400MHz) (x86_64/1 cpu[8 cores])
    on        linux - 6.18.16-200.fc43.x86_64 [Fedora Linux 44]
    using     ccache clang version Clang 22.1.6 (Fedora 22.1.6-1.fc44)
    smoketime 3 hours 28 minutes (average 52 minutes 10 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

v5.43.11-4-g96a66a0c2f  Configuration (common) -Accflags="-g -fno-omit-frame-pointer -fno-sanitize-recover=undefined -fsanitize-blacklist=`pwd`/asan_ignore" -Aldflags="-fno-sanitize-recover=undefined" -Dcc="ccache clang"
----------- ---------------------------------------------------------
F F         
F F         -Duseithreads
| +--------- -DDEBUGGING
+----------- no debugging


Testsuite was run only with 'harness' and HARNESS_OPTIONS=j4

Failures: (common-args) -Accflags="-g -fno-omit-frame-pointer -fno-sanitize-recover=undefined -fsanitize-blacklist=`pwd`/asan_ignore" -Aldflags="-fno-sanitize-recover=undefined" -Dcc="ccache clang"
[default] 
[default] -DDEBUGGING
[default] -Duseithreads
[default] -DDEBUGGING -Duseithreads
../dist/Module-CoreList/t/maintainer.t......................FAILED
    4-5
    Non-zero exit status: 2
../t/porting/corelist.t.....................................FAILED
    3-5

MANIFEST did not declare '.mailmap'
(See log because mailing list size limit is too small.)
Non-Fatal messages(gcc):

-- 
Report by Test::Smoke v1.72 running on perl 5.42.2
(Reporter v0.053 / Smoker v0.046)