[1/17] cxx dbg '' cpp/pylib.cc _build/obj/cxx-dbg/cpp/pylib.o
[2/17] cxx dbg '' cpp/libc.cc _build/obj/cxx-dbg/cpp/libc.o
[3/17] cxx dbg '' cpp/osh_tdop.cc _build/obj/cxx-dbg/cpp/osh_tdop.o
[4/17] cxx dbg '' cpp/core.cc _build/obj/cxx-dbg/cpp/core.o
FAILED: _build/obj/cxx-dbg/cpp/core.o 
build/ninja-rules-cpp.sh compile_one cxx dbg '' cpp/core.cc _build/obj/cxx-dbg/cpp/core.o _build/obj/cxx-dbg/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) != 0) {
         ^~~~~~~~
[5/17] cxx dbg '' cpp/pgen2.cc _build/obj/cxx-dbg/cpp/pgen2.o
[6/17] cxx dbg '' cpp/osh.cc _build/obj/cxx-dbg/cpp/osh.o
[7/17] cxx dbg '' _gen/frontend/arg_types.cc _build/obj/cxx-dbg/_gen/frontend/arg_types.o
[8/17] cxx dbg '' _gen/data_lang/nil8.asdl.cc _build/obj/cxx-dbg/_gen/data_lang/nil8.asdl.o
[9/17] cxx dbg '' cpp/stdlib.cc _build/obj/cxx-dbg/cpp/stdlib.o
ninja: build stopped: subcommand failed.