Compile failure happened during packaging of the installer at https://build.chromium.org/p/chromium.win/builders/Win%20Builder/builds/35082 

FAILED: chrome.7z setup.ex_ gen/chrome/installer/mini_installer/mini_installer/packed_files.rc chrome.packed.7z 
C:/b/depot_tools/python276_bin/python.exe ../../chrome/tools/build/win/create_installer_archive.py --build_dir . --staging_dir gen/chrome/installer/mini_installer/mini_installer --input_file ../../chrome/installer/mini_installer/chrome.release --resource_file_path gen/chrome/installer/mini_installer/mini_installer/packed_files.rc --target_arch=x86 --distribution=_google_chrome --output_dir . --chrome_runtime_deps gen/chrome_component.runtime_deps --setup_runtime_deps gen/setup.runtime_deps --enable_hidpi=1 --depfile gen/chrome/installer/mini_installer/archive.d
Traceback (most recent call last):

  File "../../chrome/tools/build/win/create_installer_archive.py", line 659, in <module>
    sys.exit(main(options))
  File "../../chrome/tools/build/win/create_installer_archive.py", line 563, in main
    current_build_number, prev_build_number)
  File "../../chrome/tools/build/win/create_installer_archive.py", line 300, in CreateArchiveFile
    options.verbose)
  File "../../chrome/tools/build/win/create_installer_archive.py", line 93, in CompressUsingLZMA
    RunSystemCommand(cmd, verbose)
  File "../../chrome/tools/build/win/create_installer_archive.py", line 205, in RunSystemCommand
    (e.cmd, e.returncode, e.output))

Exception: Error while running cmd: ['.\\..\\..\\third_party\\lzma_sdk\\Executable\\7za.exe', 'a', '-t7z', '-m0=BCJ2', '-m1=LZMA:d27:fb128', '-m2=LZMA:d22:fb128:mf=bt2', '-m3=LZMA:d22:fb128:mf=bt2', '-mb0:1', '-mb0s1:2', '-mb0s2:3', 'C:\\b\\c\\b\\win\\src\\out\\Release\\chrome.packed.7z', 'C:\\b\\c\\b\\win\\src\\out\\Release\\chrome.7z']
Exit code: 2

Command output:
7-Zip (a) [64] 15.14 : Copyright (c) 1999-2015 Igor Pavlov : 2015-12-31

Open archive: C:\b\c\b\win\src\out\Release\chrome.packed.7z
ERROR: C:\b\c\b\win\src\out\Release\chrome.packed.7z
Can not open the file as archive
System ERROR:
Access is denied.

bradnelson: can you take an initial look? The next build went green with no change in between.