Re: Interesting fail when migrating Pg from Ubuntu Bionic to Focal

hubert depesz lubaczewski <depesz@depesz.com> writes:
> OK. Traced it back to JIT. With JIT enabled:

Hah, that's useful info.  Seems like it must be incorrect code
generated by JIT.

> versions of things that I think are relevant:

> =$ dpkg -l | grep -E 'llvm|clang|gcc|glibc'
> ii  gcc                                4:9.3.0-1ubuntu2                      arm64        GNU C compiler
> ii  gcc-10-base:arm64                  10.3.0-1ubuntu1~20.04                 arm64        GCC, the GNU Compiler
Collection(base package) 
> ii  gcc-9                              9.3.0-17ubuntu1~20.04                 arm64        GNU C compiler
> ii  gcc-9-base:arm64                   9.3.0-17ubuntu1~20.04                 arm64        GCC, the GNU Compiler
Collection(base package) 
> ii  libgcc-9-dev:arm64                 9.3.0-17ubuntu1~20.04                 arm64        GCC support library
(developmentfiles) 
> ii  libgcc-s1:arm64                    10.3.0-1ubuntu1~20.04                 arm64        GCC support library
> ii  libllvm9:arm64                     1:9.0.1-12                            arm64        Modular compiler and
toolchaintechnologies, runtime library 

arm64, eh?  I wonder if that's buggier than the Intel code paths.

I tried and failed to reproduce this on Fedora 35 on aarch64,
but that has what I think is a newer LLVM version:

clang-13.0.0-3.fc35.aarch64
clang-libs-13.0.0-3.fc35.aarch64
clang-resource-filesystem-13.0.0-3.fc35.aarch64
gcc-11.2.1-9.fc35.aarch64
gcc-c++-11.2.1-9.fc35.aarch64
llvm-13.0.0-4.fc35.aarch64
llvm-devel-13.0.0-4.fc35.aarch64
llvm-libs-13.0.0-4.fc35.aarch64
llvm-static-13.0.0-4.fc35.aarch64
llvm-test-13.0.0-4.fc35.aarch64

Don't think I can readily install anything as old as LLVM 9 ...

            regards, tom lane