Re: [PATCH] test-lib: set UBSAN_OPTIONS to match ASan

Jeff King [off-list ref] writes:

So that's garbage memory which would _usually_ cause us to segfault, but
UBSan catches it and complains first about the alignment. That makes
sense, but the weird thing is that UBSan then exits instead of aborting,
so our test_might_fail call considers that an acceptable outcome and the
test "passes".

t4058 unexpectedly succeeding vaguely rings a bell to me, too, but
it has been sporadic.  The changes are obviously the right thing to
do.

Thanks, queued.