The compilation fails on -Warray-bounds, even though the branch is never taken:
inlined from ‘managed_bytes::managed_bytes(bytes_view)’ at ./utils/managed_bytes.hh:195:22,
inlined from ‘managed_bytes::managed_bytes(const bytes&)’ at ./utils/managed_bytes.hh:162:77,
inlined from ‘dht::token dht::bytes_to_token(bytes)’ at dht/random_partitioner.cc:68:57,
inlined from ‘dht::token dht::random_partitioner::get_token(bytes)’ at dht/random_partitioner.cc:85:39:
/usr/include/c++/8/bits/stl_algobase.h:368:23: error: ‘void* __builtin_memmove(void*, const void*, long unsigned int)’ offset 16 from the object at ‘<anonymous>’ is out of the bounds of referenced subobject ‘managed_bytes::small_blob::data’ with type ‘signed char [15]’ at offset 0 [-Werror=array-bounds]
__builtin_memmove(__result, __first, sizeof(_Tp) * _Num);
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Work around by disabling the diagnostic locally.
Message-Id: <1547205350-30225-1-git-send-email-tgrabiec@scylladb.com>
6461e085fe