[1/16] cxx opt '' cpp/pylib.cc _build/obj/cxx-opt/cpp/pylib.o
[2/16] cxx opt '' cpp/osh_tdop.cc _build/obj/cxx-opt/cpp/osh_tdop.o
[3/16] cxx opt '' cpp/osh.cc _build/obj/cxx-opt/cpp/osh.o
[4/16] cxx opt '' cpp/core.cc _build/obj/cxx-opt/cpp/core.o
FAILED: _build/obj/cxx-opt/cpp/core.o 
build/ninja-rules-cpp.sh compile_one cxx opt '' cpp/core.cc _build/obj/cxx-opt/cpp/core.o _build/obj/cxx-opt/cpp/core.o.d
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:196,
                 from /usr/include/stdlib.h:394,
                 from /usr/include/c++/8/cstdlib:75,
                 from /usr/include/c++/8/stdlib.h:36,
                 from /home/uke/oil/mycpp/mark_sweep_heap.h:4,
                 from /home/uke/oil/mycpp/gc_alloc.h:19,
                 from /home/uke/oil/mycpp/runtime.h:8,
                 from /home/uke/oil/_gen/frontend/syntax.asdl.h:8,
                 from /home/uke/oil/cpp/core.h:9,
                 from cpp/core.cc:3:
cpp/core.cc: In function 'List<int>* pyos::WaitForInputs(List<int>*)':
cpp/core.cc:267:9: error: expected primary-expression before ')' token
     if (FD_ISSET(fds_in->at(n), fd_set)) {
         ^~~~~~~~
[5/16] cxx opt '' cpp/stdlib.cc _build/obj/cxx-opt/cpp/stdlib.o
[6/16] cxx opt '' cpp/pgen2.cc _build/obj/cxx-opt/cpp/pgen2.o
[7/16] cxx opt '' _gen/frontend/arg_types.cc _build/obj/cxx-opt/_gen/frontend/arg_types.o
[8/16] cxx opt '' _gen/data_lang/nil8.asdl.cc _build/obj/cxx-opt/_gen/data_lang/nil8.asdl.o
[9/16] cxx opt '' _gen/frontend/consts.cc _build/obj/cxx-opt/_gen/frontend/consts.o
ninja: build stopped: subcommand failed.