The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976

commit 112d7b025fc05fe5a7f6e00c2f0a6717dbe91976
Author: Sigurður Ásgeirsson <siggi@chromium.org>
Date: Thu Nov 23 14:23:54 2017

Revert "Count annotation subtypes that appear in PDF documents."

This reverts commit 6c9aa01842b041e38243a51e09d446274c7b5297.

Reason for revert: breaks chromium.lkgr Win_SyzyASAN_LKG build

Bug:  788176 

Original change's description:
> Count annotation subtypes that appear in PDF documents.
> 
> Bug:  chromium:768986 
> Change-Id: I25fcf447501224d02be40565c8ec770a06edd2e6
> Reviewed-on: https://chromium-review.googlesource.com/740141
> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
> Reviewed-by: dsinclair <dsinclair@chromium.org>
> Reviewed-by: Ilya Sherman <isherman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#518771}

TBR=dsinclair@chromium.org,isherman@chromium.org,hnakashima@chromium.org

Change-Id: I05c59dcd9488428bf8182216bb81aac8c667ea4e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  chromium:768986 
Reviewed-on: https://chromium-review.googlesource.com/788030
Reviewed-by: Sigurður Ásgeirsson <siggi@chromium.org>
Commit-Queue: Sigurður Ásgeirsson <siggi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518929}
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/BUILD.gn
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/out_of_process_instance.cc
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/out_of_process_instance.h
[delete] https://crrev.com/57b2dc23b962feeadd2dcf60a399c9f38d2087e3/pdf/pdf_engine.cc
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/pdf_engine.h
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/pdfium/pdfium_page.cc
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/pdfium/pdfium_page.h
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/preview_mode_client.cc
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/pdf/preview_mode_client.h
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/112d7b025fc05fe5a7f6e00c2f0a6717dbe91976/tools/metrics/histograms/histograms.xml

What's the actual issue here? I don't understand the error output. How do we fix this so we can reland our CL? How do we test the change? Why does this pass all other bots but not compile on this bot?

Ah, I see the error is on the bottom, missed it, I found the error in the code. Thanks.

I replied on the CL that cause this bug, but this isn't a SyzyAsan specific issue, this is a MSVC build failure. We recently switched the Win builders to Clang and there's no good coverage for the MSVC config right now (the team is working on this), in the meantime the SyzyAsan bot is one of the only one that allows us to catch this kind of issue...

Yeah, apparently this is one annoying difference between Clang and MSVC. We're nominally keeping the MSVC build alive for a couple of milestones at least, so I hope we're getting try/build bot coverage for this.

Yups, same error on the official build:

[38003/52471] CXX obj/pdf/pdf/pdfium_engine.obj
FAILED: obj/pdf/pdf/pdfium_engine.obj 
ninja -t msvc -e environment.x86 -- "c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\bin\hostx64\x86/cl.exe" /nologo /showIncludes  @obj/pdf/pdf/pdfium_engine.obj.rsp /c ../../pdf/pdfium/pdfium_engine.cc /Foobj/pdf/pdf/pdfium_engine.obj /Fd"obj/pdf/pdf_cc.pdb"
c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\include\xutility(3107): error C2220: warning treated as error - no 'object' file generated
c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\include\xutility(3126): note: see reference to function template instantiation '_InIt std::_Find_unchecked1<_InIt,_Ty>(_InIt,_InIt,const _Ty &,std::false_type)' being compiled
        with
        [
            _InIt=int *,
            _Ty=::size_t
        ]
c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\include\xutility(3135): note: see reference to function template instantiation '_InIt std::_Find_unchecked<int*,_Ty>(_InIt,_InIt,const _Ty &)' being compiled
        with
        [
            _InIt=int *,
            _Ty=::size_t
        ]
../../pdf/pdfium/pdfium_engine.cc(3129): note: see reference to function template instantiation '_InIt std::find<std::_Vector_iterator<std::_Vector_val<std::_Simple_types<_Ty>>>,::size_t>(_InIt,_InIt,const unsigned int &)' being compiled
        with
        [
            _InIt=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<PP_Resource>>>,
            _Ty=PP_Resource
        ]
c:\b\c\win_toolchain\vs_files\a9e1098bba66d2acccc377d5ee81265910f29272\vc\tools\msvc\14.11.25503\include\xutility(3107): warning C4389: '==': signed/unsigned mismatch

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b

commit fd7edf2acda4e3a7bc921de6aca3fcbb3599349b
Author: Henrique Nakashima <hnakashima@chromium.org>
Date: Wed Nov 29 22:03:49 2017

Reland "Count annotation subtypes that appear in PDF documents."

Original: https://chromium-review.googlesource.com/c/chromium/src/+/740141
Revert: https://chromium-review.googlesource.com/c/chromium/src/+/788030

This reverts commit 112d7b025fc05fe5a7f6e00c2f0a6717dbe91976.

Bug:  768986 , 788176 
TBR: isherman@chromium.org
Change-Id: Ie5c8889f73443b9eefccd803f15cd0c0b1cd1ce9
Reviewed-on: https://chromium-review.googlesource.com/788330
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#520262}
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/BUILD.gn
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/out_of_process_instance.cc
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/out_of_process_instance.h
[add] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/pdf_engine.cc
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/pdf_engine.h
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/pdfium/pdfium_engine.cc
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/pdfium/pdfium_page.cc
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/pdfium/pdfium_page.h
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/preview_mode_client.cc
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/pdf/preview_mode_client.h
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/fd7edf2acda4e3a7bc921de6aca3fcbb3599349b/tools/metrics/histograms/histograms.xml