Failed to build with Make 4.3

[zyoNe-cell]

Error:
/home/ziyang/platforms/llvm-obfuscator/include/llvm/ExecutionEngine/Orc/OrcRemoteTargetClient.h:722:26: error: could not convert ‘((llvm::orc::remote::OrcRemoteTargetClient*)this)->callBllvm::orc::remote::OrcRemoteTargetRPCAPI::ReadMem(Src, Size)’ from ‘Expected<vector<unsigned char,allocator>>’ to ‘Expected<vector<char,allocator>>’
722 | return callB(Src, Size);
| ~~~~~~~~~~~~~~^~~~~~~~~~~
| |
| Expected<vector<unsigned char,allocator>>

Seems to be an internal bug in the LLVM 4 version.
Source:https://bugzilla.redhat.com/show_bug.cgi?id=1540620