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/log293f8249d5b662eb7b4c4ea021c010d58ba32392.log.gz

Automated smoke report for branch blead 5.45.2 patch 293f8249d5b662eb7b4c4ea021c010d58ba32392 v5.45.1-172-g293f8249d5
sechs: AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx (AuthenticAMD 1400MHz) (x86_64/1 cpu[8 cores])
    on        linux - 7.1.5-201.fc44.x86_64 [Fedora Linux 44]
    using     ccache clang version Clang 22.1.8 (Fedora 22.1.8-4.fc44)
    smoketime 2 days 16 hours 33 minutes (average 4 hours 2 minutes)

Summary: FAIL(m)

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

v5.45.1-172-g293f8249d5  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
m - - m - - -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
m - - m - - -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 
(See log because mailing list size limit is too small.)
Non-Fatal messages(gcc):

-- 
Report by Test::Smoke v1.72 running on perl 5.42.3
(Reporter v0.053 / Smoker v0.046)