(asdl_main c) -> _gen/frontend/types.asdl_c.h
  (frontend/consts_gen c) -> _gen/frontend/id_kind.asdl_c.h
  (lexer_gen) -> _gen/_tmp/match.re2c-input.h
_gen/_tmp/match.re2c-input.h -> (re2c) -> _gen/frontend/match.re2c.h
[1/11] asdl_main cpp  asdl/examples/demo_lib.asdl _gen/asdl/examples/demo_lib.asdl _gen/asdl/examples/demo_lib.asdl_debug.py
[2/11] asdl_main cpp  asdl/examples/typed_arith.asdl _gen/asdl/examples/typed_arith.asdl _gen/asdl/examples/typed_arith.asdl_debug.py
[3/11] asdl_main cpp  asdl/examples/shared_variant.asdl _gen/asdl/examples/shared_variant.asdl _gen/asdl/examples/shared_variant.asdl_debug.py
[4/11] asdl_main cpp  asdl/examples/typed_demo.asdl _gen/asdl/examples/typed_demo.asdl _gen/asdl/examples/typed_demo.asdl_debug.py
[5/11] cxx asan '' _gen/asdl/examples/demo_lib.asdl.cc _build/obj/cxx-asan/_gen/asdl/examples/demo_lib.asdl.o
[6/11] cxx asan '' _gen/asdl/examples/shared_variant.asdl.cc _build/obj/cxx-asan/_gen/asdl/examples/shared_variant.asdl.o
[7/11] cxx asan '' _gen/asdl/examples/typed_arith.asdl.cc _build/obj/cxx-asan/_gen/asdl/examples/typed_arith.asdl.o
[8/11] cxx asan '' prebuilt/asdl/runtime.mycpp.cc _build/obj/cxx-asan/prebuilt/asdl/runtime.mycpp.o
[9/11] cxx asan '' _gen/asdl/examples/typed_demo.asdl.cc _build/obj/cxx-asan/_gen/asdl/examples/typed_demo.asdl.o
[10/11] cxx asan '' asdl/gen_cpp_test.cc _build/obj/cxx-asan/asdl/gen_cpp_test.o
[11/11] LINK cxx asan '' _bin/cxx-asan/asdl/gen_cpp_test _build/obj/cxx-asan/asdl/gen_cpp_test.o _build/obj/cxx-asan/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-asan/_gen/asdl/examples/shared_variant.asdl.o _build/obj/cxx-asan/_gen/asdl/examples/typed_arith.asdl.o _build/obj/cxx-asan/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-asan/_gen/core/runtime.asdl.o _build/obj/cxx-asan/_gen/core/value.asdl.o _build/obj/cxx-asan/cpp/data_lang.o _build/obj/cxx-asan/_gen/display/pretty.asdl.o _build/obj/cxx-asan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-asan/_gen/frontend/syntax.asdl.o _build/obj/cxx-asan/mycpp/bump_leak_heap.o _build/obj/cxx-asan/mycpp/gc_builtins.o _build/obj/cxx-asan/mycpp/gc_iolib.o _build/obj/cxx-asan/mycpp/gc_mops.o _build/obj/cxx-asan/mycpp/gc_mylib.o _build/obj/cxx-asan/mycpp/gc_str.o _build/obj/cxx-asan/mycpp/hash.o _build/obj/cxx-asan/mycpp/mark_sweep_heap.o _build/obj/cxx-asan/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-asan/asdl/gen_cpp_test > _test/cxx-asan/asdl/gen_cpp_test.log
OK
[1/2] cxx asan '' asdl/gc_test.cc _build/obj/cxx-asan/asdl/gc_test.o
[2/2] LINK cxx asan '' _bin/cxx-asan/asdl/gc_test _build/obj/cxx-asan/asdl/gc_test.o _build/obj/cxx-asan/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-asan/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-asan/_gen/core/runtime.asdl.o _build/obj/cxx-asan/_gen/core/value.asdl.o _build/obj/cxx-asan/cpp/data_lang.o _build/obj/cxx-asan/_gen/display/pretty.asdl.o _build/obj/cxx-asan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-asan/_gen/frontend/syntax.asdl.o _build/obj/cxx-asan/mycpp/bump_leak_heap.o _build/obj/cxx-asan/mycpp/gc_builtins.o _build/obj/cxx-asan/mycpp/gc_iolib.o _build/obj/cxx-asan/mycpp/gc_mops.o _build/obj/cxx-asan/mycpp/gc_mylib.o _build/obj/cxx-asan/mycpp/gc_str.o _build/obj/cxx-asan/mycpp/hash.o _build/obj/cxx-asan/mycpp/mark_sweep_heap.o _build/obj/cxx-asan/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-asan/asdl/gc_test > _test/cxx-asan/asdl/gc_test.log
OK
[1/21] cxx asan+gcalways '' _gen/asdl/examples/demo_lib.asdl.cc _build/obj/cxx-asan+gcalways/_gen/asdl/examples/demo_lib.asdl.o
[2/21] cxx asan+gcalways '' _gen/asdl/examples/typed_arith.asdl.cc _build/obj/cxx-asan+gcalways/_gen/asdl/examples/typed_arith.asdl.o
[3/21] cxx asan+gcalways '' _gen/asdl/examples/shared_variant.asdl.cc _build/obj/cxx-asan+gcalways/_gen/asdl/examples/shared_variant.asdl.o
[4/21] cxx asan+gcalways '' _gen/asdl/examples/typed_demo.asdl.cc _build/obj/cxx-asan+gcalways/_gen/asdl/examples/typed_demo.asdl.o
[5/21] cxx asan+gcalways '' cpp/data_lang.cc _build/obj/cxx-asan+gcalways/cpp/data_lang.o
[6/21] cxx asan+gcalways '' mycpp/bump_leak_heap.cc _build/obj/cxx-asan+gcalways/mycpp/bump_leak_heap.o
[7/21] cxx asan+gcalways '' _gen/frontend/id_kind.asdl.cc _build/obj/cxx-asan+gcalways/_gen/frontend/id_kind.asdl.o
[8/21] cxx asan+gcalways '' _gen/core/runtime.asdl.cc _build/obj/cxx-asan+gcalways/_gen/core/runtime.asdl.o
[9/21] cxx asan+gcalways '' _gen/display/pretty.asdl.cc _build/obj/cxx-asan+gcalways/_gen/display/pretty.asdl.o
[10/21] cxx asan+gcalways '' mycpp/gc_mops.cc _build/obj/cxx-asan+gcalways/mycpp/gc_mops.o
[11/21] cxx asan+gcalways '' _gen/core/value.asdl.cc _build/obj/cxx-asan+gcalways/_gen/core/value.asdl.o
[12/21] cxx asan+gcalways '' mycpp/gc_builtins.cc _build/obj/cxx-asan+gcalways/mycpp/gc_builtins.o
[13/21] cxx asan+gcalways '' mycpp/hash.cc _build/obj/cxx-asan+gcalways/mycpp/hash.o
[14/21] cxx asan+gcalways '' mycpp/gc_iolib.cc _build/obj/cxx-asan+gcalways/mycpp/gc_iolib.o
[15/21] cxx asan+gcalways '' mycpp/gc_mylib.cc _build/obj/cxx-asan+gcalways/mycpp/gc_mylib.o
[16/21] cxx asan+gcalways '' mycpp/mark_sweep_heap.cc _build/obj/cxx-asan+gcalways/mycpp/mark_sweep_heap.o
[17/21] cxx asan+gcalways '' prebuilt/asdl/runtime.mycpp.cc _build/obj/cxx-asan+gcalways/prebuilt/asdl/runtime.mycpp.o
[18/21] cxx asan+gcalways '' asdl/gen_cpp_test.cc _build/obj/cxx-asan+gcalways/asdl/gen_cpp_test.o
[19/21] cxx asan+gcalways '' _gen/frontend/syntax.asdl.cc _build/obj/cxx-asan+gcalways/_gen/frontend/syntax.asdl.o
[20/21] cxx asan+gcalways '' mycpp/gc_str.cc _build/obj/cxx-asan+gcalways/mycpp/gc_str.o
[21/21] LINK cxx asan+gcalways '' _bin/cxx-asan+gcalways/asdl/gen_cpp_test _build/obj/cxx-asan+gcalways/asdl/gen_cpp_test.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/shared_variant.asdl.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/typed_arith.asdl.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-asan+gcalways/_gen/core/runtime.asdl.o _build/obj/cxx-asan+gcalways/_gen/core/value.asdl.o _build/obj/cxx-asan+gcalways/cpp/data_lang.o _build/obj/cxx-asan+gcalways/_gen/display/pretty.asdl.o _build/obj/cxx-asan+gcalways/_gen/frontend/id_kind.asdl.o _build/obj/cxx-asan+gcalways/_gen/frontend/syntax.asdl.o _build/obj/cxx-asan+gcalways/mycpp/bump_leak_heap.o _build/obj/cxx-asan+gcalways/mycpp/gc_builtins.o _build/obj/cxx-asan+gcalways/mycpp/gc_iolib.o _build/obj/cxx-asan+gcalways/mycpp/gc_mops.o _build/obj/cxx-asan+gcalways/mycpp/gc_mylib.o _build/obj/cxx-asan+gcalways/mycpp/gc_str.o _build/obj/cxx-asan+gcalways/mycpp/hash.o _build/obj/cxx-asan+gcalways/mycpp/mark_sweep_heap.o _build/obj/cxx-asan+gcalways/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-asan+gcalways/asdl/gen_cpp_test > _test/cxx-asan+gcalways/asdl/gen_cpp_test.log
OK
[1/2] cxx asan+gcalways '' asdl/gc_test.cc _build/obj/cxx-asan+gcalways/asdl/gc_test.o
[2/2] LINK cxx asan+gcalways '' _bin/cxx-asan+gcalways/asdl/gc_test _build/obj/cxx-asan+gcalways/asdl/gc_test.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-asan+gcalways/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-asan+gcalways/_gen/core/runtime.asdl.o _build/obj/cxx-asan+gcalways/_gen/core/value.asdl.o _build/obj/cxx-asan+gcalways/cpp/data_lang.o _build/obj/cxx-asan+gcalways/_gen/display/pretty.asdl.o _build/obj/cxx-asan+gcalways/_gen/frontend/id_kind.asdl.o _build/obj/cxx-asan+gcalways/_gen/frontend/syntax.asdl.o _build/obj/cxx-asan+gcalways/mycpp/bump_leak_heap.o _build/obj/cxx-asan+gcalways/mycpp/gc_builtins.o _build/obj/cxx-asan+gcalways/mycpp/gc_iolib.o _build/obj/cxx-asan+gcalways/mycpp/gc_mops.o _build/obj/cxx-asan+gcalways/mycpp/gc_mylib.o _build/obj/cxx-asan+gcalways/mycpp/gc_str.o _build/obj/cxx-asan+gcalways/mycpp/hash.o _build/obj/cxx-asan+gcalways/mycpp/mark_sweep_heap.o _build/obj/cxx-asan+gcalways/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-asan+gcalways/asdl/gc_test > _test/cxx-asan+gcalways/asdl/gc_test.log
OK
[1/21] cxx ubsan '' _gen/asdl/examples/demo_lib.asdl.cc _build/obj/cxx-ubsan/_gen/asdl/examples/demo_lib.asdl.o
[2/21] cxx ubsan '' _gen/asdl/examples/typed_arith.asdl.cc _build/obj/cxx-ubsan/_gen/asdl/examples/typed_arith.asdl.o
[3/21] cxx ubsan '' _gen/asdl/examples/shared_variant.asdl.cc _build/obj/cxx-ubsan/_gen/asdl/examples/shared_variant.asdl.o
[4/21] cxx ubsan '' _gen/asdl/examples/typed_demo.asdl.cc _build/obj/cxx-ubsan/_gen/asdl/examples/typed_demo.asdl.o
[5/21] cxx ubsan '' _gen/display/pretty.asdl.cc _build/obj/cxx-ubsan/_gen/display/pretty.asdl.o
[6/21] cxx ubsan '' cpp/data_lang.cc _build/obj/cxx-ubsan/cpp/data_lang.o
[7/21] cxx ubsan '' mycpp/bump_leak_heap.cc _build/obj/cxx-ubsan/mycpp/bump_leak_heap.o
[8/21] cxx ubsan '' _gen/core/value.asdl.cc _build/obj/cxx-ubsan/_gen/core/value.asdl.o
[9/21] cxx ubsan '' _gen/core/runtime.asdl.cc _build/obj/cxx-ubsan/_gen/core/runtime.asdl.o
[10/21] cxx ubsan '' _gen/frontend/id_kind.asdl.cc _build/obj/cxx-ubsan/_gen/frontend/id_kind.asdl.o
[11/21] cxx ubsan '' mycpp/gc_mops.cc _build/obj/cxx-ubsan/mycpp/gc_mops.o
[12/21] cxx ubsan '' mycpp/gc_builtins.cc _build/obj/cxx-ubsan/mycpp/gc_builtins.o
[13/21] cxx ubsan '' mycpp/gc_iolib.cc _build/obj/cxx-ubsan/mycpp/gc_iolib.o
[14/21] cxx ubsan '' mycpp/hash.cc _build/obj/cxx-ubsan/mycpp/hash.o
[15/21] cxx ubsan '' mycpp/gc_mylib.cc _build/obj/cxx-ubsan/mycpp/gc_mylib.o
[16/21] cxx ubsan '' mycpp/mark_sweep_heap.cc _build/obj/cxx-ubsan/mycpp/mark_sweep_heap.o
[17/21] cxx ubsan '' prebuilt/asdl/runtime.mycpp.cc _build/obj/cxx-ubsan/prebuilt/asdl/runtime.mycpp.o
[18/21] cxx ubsan '' asdl/gen_cpp_test.cc _build/obj/cxx-ubsan/asdl/gen_cpp_test.o
[19/21] cxx ubsan '' _gen/frontend/syntax.asdl.cc _build/obj/cxx-ubsan/_gen/frontend/syntax.asdl.o
[20/21] cxx ubsan '' mycpp/gc_str.cc _build/obj/cxx-ubsan/mycpp/gc_str.o
[21/21] LINK cxx ubsan '' _bin/cxx-ubsan/asdl/gen_cpp_test _build/obj/cxx-ubsan/asdl/gen_cpp_test.o _build/obj/cxx-ubsan/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-ubsan/_gen/asdl/examples/shared_variant.asdl.o _build/obj/cxx-ubsan/_gen/asdl/examples/typed_arith.asdl.o _build/obj/cxx-ubsan/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-ubsan/_gen/core/runtime.asdl.o _build/obj/cxx-ubsan/_gen/core/value.asdl.o _build/obj/cxx-ubsan/cpp/data_lang.o _build/obj/cxx-ubsan/_gen/display/pretty.asdl.o _build/obj/cxx-ubsan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-ubsan/_gen/frontend/syntax.asdl.o _build/obj/cxx-ubsan/mycpp/bump_leak_heap.o _build/obj/cxx-ubsan/mycpp/gc_builtins.o _build/obj/cxx-ubsan/mycpp/gc_iolib.o _build/obj/cxx-ubsan/mycpp/gc_mops.o _build/obj/cxx-ubsan/mycpp/gc_mylib.o _build/obj/cxx-ubsan/mycpp/gc_str.o _build/obj/cxx-ubsan/mycpp/hash.o _build/obj/cxx-ubsan/mycpp/mark_sweep_heap.o _build/obj/cxx-ubsan/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-ubsan/asdl/gen_cpp_test > _test/cxx-ubsan/asdl/gen_cpp_test.log
OK
[1/2] cxx ubsan '' asdl/gc_test.cc _build/obj/cxx-ubsan/asdl/gc_test.o
[2/2] LINK cxx ubsan '' _bin/cxx-ubsan/asdl/gc_test _build/obj/cxx-ubsan/asdl/gc_test.o _build/obj/cxx-ubsan/_gen/asdl/examples/demo_lib.asdl.o _build/obj/cxx-ubsan/_gen/asdl/examples/typed_demo.asdl.o _build/obj/cxx-ubsan/_gen/core/runtime.asdl.o _build/obj/cxx-ubsan/_gen/core/value.asdl.o _build/obj/cxx-ubsan/cpp/data_lang.o _build/obj/cxx-ubsan/_gen/display/pretty.asdl.o _build/obj/cxx-ubsan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-ubsan/_gen/frontend/syntax.asdl.o _build/obj/cxx-ubsan/mycpp/bump_leak_heap.o _build/obj/cxx-ubsan/mycpp/gc_builtins.o _build/obj/cxx-ubsan/mycpp/gc_iolib.o _build/obj/cxx-ubsan/mycpp/gc_mops.o _build/obj/cxx-ubsan/mycpp/gc_mylib.o _build/obj/cxx-ubsan/mycpp/gc_str.o _build/obj/cxx-ubsan/mycpp/hash.o _build/obj/cxx-ubsan/mycpp/mark_sweep_heap.o _build/obj/cxx-ubsan/prebuilt/asdl/runtime.mycpp.o
RUN _bin/cxx-ubsan/asdl/gc_test > _test/cxx-ubsan/asdl/gc_test.log
OK
[1/2] cxx asan '' core/optview_test.cc _build/obj/cxx-asan/core/optview_test.o
[2/2] LINK cxx asan '' _bin/cxx-asan/core/optview_test _build/obj/cxx-asan/core/optview_test.o
RUN _bin/cxx-asan/core/optview_test > _test/cxx-asan/core/optview_test.log
OK
[1/2] cxx asan '' core/runtime_asdl_test.cc _build/obj/cxx-asan/core/runtime_asdl_test.o
[2/2] LINK cxx asan '' _bin/cxx-asan/core/runtime_asdl_test _build/obj/cxx-asan/core/runtime_asdl_test.o _build/obj/cxx-asan/_gen/core/runtime.asdl.o _build/obj/cxx-asan/_gen/core/value.asdl.o _build/obj/cxx-asan/_gen/display/pretty.asdl.o _build/obj/cxx-asan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-asan/_gen/frontend/syntax.asdl.o
RUN _bin/cxx-asan/core/runtime_asdl_test > _test/cxx-asan/core/runtime_asdl_test.log
OK
[1/2] cxx ubsan '' core/optview_test.cc _build/obj/cxx-ubsan/core/optview_test.o
[2/2] LINK cxx ubsan '' _bin/cxx-ubsan/core/optview_test _build/obj/cxx-ubsan/core/optview_test.o
RUN _bin/cxx-ubsan/core/optview_test > _test/cxx-ubsan/core/optview_test.log
OK
[1/2] cxx ubsan '' core/runtime_asdl_test.cc _build/obj/cxx-ubsan/core/runtime_asdl_test.o
[2/2] LINK cxx ubsan '' _bin/cxx-ubsan/core/runtime_asdl_test _build/obj/cxx-ubsan/core/runtime_asdl_test.o _build/obj/cxx-ubsan/_gen/core/runtime.asdl.o _build/obj/cxx-ubsan/_gen/core/value.asdl.o _build/obj/cxx-ubsan/_gen/display/pretty.asdl.o _build/obj/cxx-ubsan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-ubsan/_gen/frontend/syntax.asdl.o
RUN _bin/cxx-ubsan/core/runtime_asdl_test > _test/cxx-ubsan/core/runtime_asdl_test.log
OK
[1/2] cxx ubsan '' cpp/obj_layout_test.cc _build/obj/cxx-ubsan/cpp/obj_layout_test.o
[2/2] LINK cxx ubsan '' _bin/cxx-ubsan/cpp/obj_layout_test _build/obj/cxx-ubsan/cpp/obj_layout_test.o _build/obj/cxx-ubsan/_gen/core/runtime.asdl.o _build/obj/cxx-ubsan/_gen/core/value.asdl.o _build/obj/cxx-ubsan/_gen/display/pretty.asdl.o _build/obj/cxx-ubsan/_gen/frontend/id_kind.asdl.o _build/obj/cxx-ubsan/_gen/frontend/syntax.asdl.o _build/obj/cxx-ubsan/mycpp/bump_leak_heap.o _build/obj/cxx-ubsan/mycpp/gc_builtins.o _build/obj/cxx-ubsan/mycpp/gc_iolib.o _build/obj/cxx-ubsan/mycpp/gc_mops.o _build/obj/cxx-ubsan/mycpp/gc_mylib.o _build/obj/cxx-ubsan/mycpp/gc_str.o _build/obj/cxx-ubsan/mycpp/hash.o _build/obj/cxx-ubsan/mycpp/mark_sweep_heap.o
RUN _bin/cxx-ubsan/cpp/obj_layout_test > _test/cxx-ubsan/cpp/obj_layout_test.log
OK
[1/8] cxx ubsan '' _gen/cpp/build_stamp.cc _build/obj/cxx-ubsan/_gen/cpp/build_stamp.o
[2/8] cxx ubsan '' cpp/core.cc _build/obj/cxx-ubsan/cpp/core.o
FAILED: _build/obj/cxx-ubsan/cpp/core.o 
build/ninja-rules-cpp.sh compile_one cxx ubsan '' cpp/core.cc _build/obj/cxx-ubsan/cpp/core.o _build/obj/cxx-ubsan/cpp/core.o.d
cpp/core.cc: In function 'List<int>* pyos::WaitForInputs(List<int>)':
cpp/core.cc:261:21: error: no matching function for call to 'len(List<int>&)'
   int n = len(fds_in)
                     ^
In file included from /home/uke/oil/mycpp/gc_alloc.h:13,
                 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:
/home/uke/oil/mycpp/gc_str.h:103:12: note: candidate: 'int len(const BigStr*)'
 inline int len(const BigStr* s) {
            ^~~
/home/uke/oil/mycpp/gc_str.h:103:12: note:   no known conversion for argument 1 from 'List<int>' to 'const BigStr*'
/home/uke/oil/mycpp/gc_str.h:184:12: note: candidate: 'int len(Str)'
 inline int len(const Str s) {
            ^~~
/home/uke/oil/mycpp/gc_str.h:184:12: note:   no known conversion for argument 1 from 'List<int>' to 'Str'
In file included from /home/uke/oil/mycpp/runtime.h:13,
                 from /home/uke/oil/_gen/frontend/syntax.asdl.h:8,
                 from /home/uke/oil/cpp/core.h:9,
                 from cpp/core.cc:3:
/home/uke/oil/mycpp/gc_list.h:216:5: note: candidate: 'template<class T> int len(const List<T>*)'
 int len(const List<T>* L) {
     ^~~
/home/uke/oil/mycpp/gc_list.h:216:5: note:   template argument deduction/substitution failed:
cpp/core.cc:261:21: note:   mismatched types 'const List<T>*' and 'List<int>'
   int n = len(fds_in)
                     ^
In file included from /home/uke/oil/mycpp/runtime.h:14,
                 from /home/uke/oil/_gen/frontend/syntax.asdl.h:8,
                 from /home/uke/oil/cpp/core.h:9,
                 from cpp/core.cc:3:
/home/uke/oil/mycpp/gc_dict.h:417:12: note: candidate: 'template<class K, class V> int len(const Dict<K, V>*)'
 inline int len(const Dict<K, V>* d) {
            ^~~
/home/uke/oil/mycpp/gc_dict.h:417:12: note:   template argument deduction/substitution failed:
cpp/core.cc:261:21: note:   mismatched types 'const Dict<K, V>*' and 'List<int>'
   int n = len(fds_in)
                     ^
cpp/core.cc:262:19: error: 'i' was not declared in this scope
   for (int i = 0; i < n; ++i) {
                   ^
cpp/core.cc:267:30: error: no match for 'operator[]' (operand types are 'List<int>' and 'int')
     if (inputAvailable(fds_in[n])) {
                              ^
cpp/core.cc:267:9: error: 'inputAvailable' was not declared in this scope
     if (inputAvailable(fds_in[n])) {
         ^~~~~~~~~~~~~~
cpp/core.cc:267:9: note: suggested alternative: 'InputAvailable'
     if (inputAvailable(fds_in[n])) {
         ^~~~~~~~~~~~~~
         InputAvailable
cpp/core.cc:268:25: error: no match for 'operator[]' (operand types are 'List<int>' and 'int')
       ret->append(fds_in[n])
                         ^
cpp/core.cc:271:13: error: expected ';' before '}' token
   return ret
             ^
             ;
 }
 ~            
[3/8] cxx ubsan '' _gen/frontend/consts.cc _build/obj/cxx-ubsan/_gen/frontend/consts.o
[4/8] cxx ubsan '' cpp/pgen2.cc _build/obj/cxx-ubsan/cpp/pgen2.o
[5/8] cxx ubsan '' cpp/stdlib.cc _build/obj/cxx-ubsan/cpp/stdlib.o
[6/8] cxx ubsan '' cpp/core_test.cc _build/obj/cxx-ubsan/cpp/core_test.o
cpp/core_test.cc: In function 'greatest_test_res waitpid_demo()':
cpp/core_test.cc:315:42: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
     char* argv[] = {"sleep", "5", nullptr};
                                          ^
cpp/core_test.cc:315:42: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
cpp/core_test.cc: At global scope:
cpp/core_test.cc:304:6: warning: 'greatest_test_res waitpid_demo()' defined but not used [-Wunused-function]
 TEST waitpid_demo() {
      ^~~~~~~~~~~~
[7/8] cxx ubsan '' _gen/ysh/grammar_tables.cc _build/obj/cxx-ubsan/_gen/ysh/grammar_tables.o
ninja: build stopped: subcommand failed.