[Help needed] Compile failure on win-libfuzzer-asan-rel

[Xinghui Lu]

Hi build experts,

I'm seeking help on a build failure with my CL https://chromium-review.googlesource.com/c/chromium/src/+/3120866. The failure is on win-libfuzzer-asan-rel with the following error:

FAILED: dial_internal_message_fuzzer.exe dial_internal_message_fuzzer.exe.pdb

ninja -t msvc -e environment.x64 -- ..\..\third_party\llvm-build\Release+Asserts\bin\lld-link.exe ...

lld-link: error: undefined symbol: struct google::protobuf::internal::SCCInfo<0> scc_info_ChromeUserPopulation_components_2fsafe_5fbrowsing_2fcore_2fcommon_2fproto_2fcsd_2eproto

>>> referenced by obj/components/safe_browsing/core/common/proto\realtimeapi_proto/realtimeapi.pb.obj:(struct google::protobuf::internal::SCCInfo<2> scc_info_RTLookupRequest_components_2fsafe_5fbrowsing_2fcore_2fcommon_2fproto_2frealtimeapi_2eproto)

ninja: build stopped: subcommand failed. 

This CL is only modifying a proto in csd.proto, which dial_internal_message_fuzzer doesn't depend on directly. And the failure doesn't happen on other builds. The only thing I noticed is both targets allow circular includes: allow_circular_includes_from.

Does anyone know what is going on and how to fix it? Thanks for your help!

[Takuto Ikuta]

People in https://source.chromium.org/chromium/chromium/src/+/main:third_party/libprotobuf-mutator/OWNERS may know more.

But what happen if you add https://source.chromium.org/chromium/chromium/src/+/main:components/safe_browsing/core/common/proto/BUILD.gn;l=18;drc=c8669e3f63274b708c6319a2f3ba22b68ca117b8 to https://source.chromium.org/chromium/chromium/src/+/main:chrome/browser/media/router/BUILD.gn;l=330;drc=da07f9fefe0b74e811c13714e7bc5293f3f707cc ?

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[Xinghui Lu]

Thanks Takuto for the suggestion! Unfortunately the error persists after adding csd_proto as a deps in dial_internal_message_fuzzer. I'll reach out to libprotobuf owners for help too.