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_sanitize=undefined/logf9dabf1844faab3234a2c9429ac748015dfa29cb.log.gz

Automated smoke report for branch blead 5.41.6 patch f9dabf1844faab3234a2c9429ac748015dfa29cb v5.41.5-87-gf9dabf1844
vier.local: Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz (GenuineIntel 3600MHz) (x86_64/1 cpu[8 cores])
    on        linux - 6.10.5-200.fc40.x86_64 [Fedora Linux 40]
    using     ccache clang version Clang 18.1.8 (Fedora 18.1.8-1.fc40)
    smoketime 20 hours 19 minutes (average 1 hour 16 minutes)

Summary: PASS

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

v5.41.5-87-gf9dabf1844  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"
----------- ---------------------------------------------------------
O O O O O O -Accflags=-DNO_MATHOMS
O O O O O O -Accflags=-DPERL_POISON
O O O O O O -Duse64bitall
O O O O O O -Dusemorebits
O O O O O O -Duseithreads -Accflags=-DNO_MATHOMS
O O O O O O -Duseithreads -Accflags=-DPERL_POISON
O O O O O O -Duseithreads -Duse64bitall
O O O O O O -Duseithreads -Dusemorebits
| | | | | +- LC_ALL = en_US.utf8 -DDEBUGGING
| | | | +--- PERLIO = perlio -DDEBUGGING
| | | +----- PERLIO = stdio  -DDEBUGGING
| | +------- LC_ALL = en_US.utf8
| +--------- PERLIO = perlio
+----------- PERLIO = stdio 

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 5.38.2
(Reporter v0.053 / Smoker v0.046)