Zhihong Yu <zyu@yugabyte.com> writes:
> On Thu, Mar 3, 2022 at 8:24 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Oh, I misread this as a compile-time warning, but it must be from ASAN.
>> Was the test case one of your own, or just our normal regression tests?
> The Jenkins test is ported from contrib/postgres_fdw/sql/postgres_fdw.sql -
> so theoretically PG would see the same error for clang12 on Alma.
Hmph. I tried enabling -fsanitize=undefined here, and I get some
complaints about passing null pointers to memcmp and the like, but
nothing about this shift (tested with clang 12.0.1 on RHEL8 as well
as clang 13.0.0 on Fedora 35). What compiler switches are being
used exactly?
regards, tom lane