https://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Unit%20%28DrMemory%20x64%29/builds/1827

UNADDRESSABLE ACCESS: reading 0x000000000000001b-0x000000000000001c 1 byte(s)
# 0 base.dll!std::_Tree<>::_Lbound<>                                           [e:\b\depot_tools\win_toolchain\vs_files\95ddda401ec5678f15eeed01d2bee08fcbc5ee97\vc\include\xtree:2093]
# 1 base.dll!base::CommandLine::GetSwitchValueNative                           [base\command_line.cc:320]
# 2 base.dll!base::CommandLine::GetSwitchValueASCII                            [base\command_line.cc:300]
# 3 extensions::FeatureSwitch::IsEnabled                                       [extensions\common\feature_switch.cc:175]
# 4 extensions::FeatureSwitch::extension_action_redesign                       [extensions\common\feature_switch.cc:109]
# 5 extensions::ExtensionActionHandler::Parse                                  [chrome\common\extensions\manifest_handlers\extension_action_handler.cc:64]
# 6 extensions::ManifestHandlerRegistry::ParseExtension                        [extensions\common\manifest_handler.cc:146]
# 7 extensions::Extension::LoadSharedFeatures                                  [extensions\common\extension.cc:689]
# 8 extensions::Extension::InitFromValue                                       [extensions\common\extension.cc:544]
# 9 extensions::Extension::Create                                              [extensions\common\extension.cc:137]
#10 `anonymous namespace'::CreateExtension                                     [chrome\browser\ui\sync\profile_signin_confirmation_helper_unittest.cc:112]
#11 ProfileSigninConfirmationHelperTest_PromptForNewProfile_Extensions_Test::TestBody [chrome\browser\ui\sync\profile_signin_confirmation_helper_unittest.cc:215]