Unable to repro. The warnings do not occur on Ubuntu 20.04 with gcc-11 (Ubuntu 11-20210417-1ubuntu1) 11.0.1 20210417 using compiler options -O0 -Wall.
Unable to repro. The warnings do not occur on Ubuntu 20.04 with gcc-11 (Ubuntu 11-20210417-1ubuntu1) 11.0.1 20210417 using compiler options -O0 -Wall.