[1/3] cxx opt '' _gen/bin/oils_for_unix.mycpp.cc _build/obj/cxx-opt/_gen/bin/oils_for_unix.mycpp.o
FAILED: _build/obj/cxx-opt/_gen/bin/oils_for_unix.mycpp.o 
build/ninja-rules-cpp.sh compile_one cxx opt '' _gen/bin/oils_for_unix.mycpp.cc _build/obj/cxx-opt/_gen/bin/oils_for_unix.mycpp.o _build/obj/cxx-opt/_gen/bin/oils_for_unix.mycpp.o.d
_gen/bin/oils_for_unix.mycpp.cc: In member function 'virtual int readline_osh::Bind::Run(runtime_asdl::cmd_value::Argv*)':
_gen/bin/oils_for_unix.mycpp.cc:22035:18: error: invalid operands of types 'bool' and 'std::nullptr_t' to binary 'operator!='
       if (arg->X != nullptr) {
           ~~~~~~~^~~~~~~~~~
ninja: build stopped: subcommand failed.