build failed using clang-13 with error: variable 'y' set but not used [-Werror,-Wunused-but-set-variable] #27705
Description
Operating system
semin-serg@semin-serg-ub:~/ClickHouse$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.2 LTS"
Cmake version
semin-serg@semin-serg-ub:~/ClickHouse$ cmake --version
cmake version 3.16.3
CMake suite maintained and supported by Kitware (kitware.com/cmake).
Ninja version
semin-serg@semin-serg-ub:~/ClickHouse$ ninja --version
1.10.0
Compiler name and version
semin-serg@semin-serg-ub:~/ClickHouse$ clang-13 --version
Ubuntu clang version 13.0.0-++20210813082601+aac4fe380d16-1~exp1~20210813063406.40
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
semin-serg@semin-serg-ub:~/ClickHouse$ clang++-13 --version
Ubuntu clang version 13.0.0-++20210813082601+aac4fe380d16-1~exp1~20210813063406.40
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Full cmake and/or ninja output
see in attached file cmake-and-ninja-run.txt