(I don't expect this to ever be fixed but I need something to refer to when disabling jumbo for nacl in ppapi).

You can get strange bind errors if you instantiate similar types twice in the same translation unit with the nacl-clang toolchain. The ordinary toolchain is happy enough.

Error message:

FAILED: irt_x64/obj/ppapi/shared_impl/shared_impl/shared_impl_jumbo_2.o 
/home/bratell/goma/gomacc ../../native_client/toolchain/linux_x86/pnacl_newlib/bin/x86_64-nacl-clang++ -MMD -MF irt_x64/obj/ppapi/shared_impl/shared_impl/shared_impl_jumbo_2.o.d -DNACL_TC_REV=b48266b051f596802addff7c8d1fc6fb9cf6bea7 -DPPAPI_SHARED_IMPLEMENTATION -DPPAPI_THUNK_IMPLEMENTATION -DV8_DEPRECATION_WARNINGS -DNO_TCMALLOC -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DOFFICIAL_BUILD -DCHROMIUM_BUILD -DFIELDTRIAL_TESTING_ENABLED -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_GNU_SOURCE -DCR_CLANG_REVISION=\"346388-5\" -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D_FORTIFY_SOURCE=2 -DNDEBUG -DNVALGRIND -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DUSE_CHROMIUM_ICU=1 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -DGOOGLE_PROTOBUF_NO_RTTI -DGOOGLE_PROTOBUF_NO_STATIC_INITIALIZER -DHAVE_PTHREAD -I. -I../.. -Iirt_x64/gen -I../../third_party/khronos -I../../gpu -I../../third_party/ced/src -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../third_party/protobuf/src -fno-strict-aliasing -fcolor-diagnostics -fmerge-all-constants -U__STRICT_ANSI__ -integrated-as -m64 -march=x86-64 -fasynchronous-unwind-tables -fomit-frame-pointer -Wall -Werror -Wextra -Wimplicit-fallthrough -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-c++11-narrowing -Wno-unneeded-internal-declaration -Os -ffunction-sections -fdata-sections -fomit-frame-pointer -g2 -fvisibility=hidden -Wno-shorten-64-to-32 -std=c++14 -fno-exceptions -fno-rtti -fvisibility-inlines-hidden -c irt_x64/gen/ppapi/shared_impl/shared_impl_jumbo_2.cc -o irt_x64/obj/ppapi/shared_impl/shared_impl/shared_impl_jumbo_2.o
In file included from irt_x64/gen/ppapi/shared_impl/shared_impl_jumbo_2.cc:6:
In file included from ./../../ppapi/shared_impl/resource_tracker.cc:7:
In file included from ../../base/bind.h:10:
In file included from ../../base/bind_internal.h:15:
../../base/memory/raw_scoped_refptr_mismatch_checker.h:30:61: error: 'AddRef' is a private member of 'scoped_refptr<ppapi::internal::ThreadAwareCallbackBase::Core>'
                        void_t<decltype(std::declval<T*>()->AddRef()),
                                                            ^
../../base/bind_internal.h:903:11: note: in instantiation of template class 'base::internal::IsRefCountedType<ppapi::TrackedCallback, void>' requested here
          IsRefCountedType<std::remove_pointer_t<DecayedReceiver>>::value,
          ^
../../base/bind_internal.h:920:1: note: in instantiation of template class 'base::internal::MakeBindStateTypeImpl<true, void (ppapi::TrackedCallback::*)(int), ppapi::TrackedCallback *, int &>' requested here
using MakeBindStateType =
^
../../base/bind.h:247:31: note: in instantiation of template type alias 'MakeBindStateType' requested here
  using BindState = internal::MakeBindStateType<Functor, Args...>;
                              ^
../../base/bind.h:270:16: note: in instantiation of function template specialization 'base::BindRepeating<void (ppapi::TrackedCallback::*)(int), ppapi::TrackedCallback *, int &>' requested here
  return base::BindRepeating(std::forward<Functor>(functor),
               ^
./../../ppapi/shared_impl/tracked_callback.cc:257:30: note: in instantiation of function template specialization 'base::Bind<void (ppapi::TrackedCallback::*)(int), ppapi::TrackedCallback *, int &>' requested here
        RunWhileLocked(base::Bind(&TrackedCallback::Run, this, result)));
                             ^
../../base/memory/scoped_refptr.h:277:15: note: declared private here
  static void AddRef(T* ptr);
              ^
1 error generated.


----

A minimized (kind of, ran out of energy when coming to bind.h) test case:

#include "base/bind.h"
#include "base/callback.h"

class TrackedCallback : public base::RefCounted<TrackedCallback> {
};

class FileRefResource : public base::RefCounted<FileRefResource> {
public:
  int32_t Touch();
  void RunTrackedCallback(scoped_refptr<TrackedCallback> callback);
};

int32_t FileRefResource::Touch() {
  scoped_refptr<TrackedCallback> callback;
  base::Bind(&FileRefResource::RunTrackedCallback, this, callback);
  return 1;
}

class FileSystemResource : public base::RefCounted<FileSystemResource>{
 public:
  void ReserveQuota();
  void ReserveQuotaComplete();
};

void FileSystemResource::ReserveQuota() {
  base::Bind(&FileSystemResource::ReserveQuotaComplete, this);
}


This was discovered by https://chromium-review.googlesource.com/c/chromium/src/+/1346999
Failing bot: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/linux-jumbo-rel/132406
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8928117680806033936/+/steps/compile__with_patch_/0/stdout