Major - P3 This looks real, since that is almost certainly not what that code is actually trying to do:
[454/2741 ( 16%) 28.503s] CXX build/ninja/mongo/db/exec/geo_near.o
src/mongo/db/exec/geo_near.cpp:291:25: warning: taking the max of unsigned zero and a value is always equal to the other value [-Wmax-unsigned-zero]
_currentLevel = std::max(0u, hashParams.bits - 1u);
^~~~~~~~ ~~
src/mongo/db/exec/geo_near.cpp:291:25: note: remove call to max function and unsigned zero argument
_currentLevel = std::max(0u, hashParams.bits - 1u);
^~~~~~~~ ~~~
1 warning generated.
[643/2741 ( 23%) 35.820s] CXX build/ninja/mongo/db/geo/r2_region_coverer.o
src/mongo/db/geo/r2_region_coverer.cpp:73:17: warning: taking the max of unsigned zero and a value is always equal to the other value [-Wmax-unsigned-zero]
_minLevel = max(0u, min(GeoHash::kMaxBits, minLevel));
^~~ ~~
src/mongo/db/geo/r2_region_coverer.cpp:73:17: note: remove call to max function and unsigned zero argument
_minLevel = max(0u, min(GeoHash::kMaxBits, minLevel));
^~~ ~~~
src/mongo/db/geo/r2_region_coverer.cpp:79:17: warning: taking the max of unsigned zero and a value is always equal to the other value [-Wmax-unsigned-zero]
_maxLevel = max(0u, min(GeoHash::kMaxBits, maxLevel));
^~~ ~~
src/mongo/db/geo/r2_region_coverer.cpp:79:17: note: remove call to max function and unsigned zero argument
_maxLevel = max(0u, min(GeoHash::kMaxBits, maxLevel));
^~~ ~~~
2 warnings generated.