I hit this DCHECK in a local build of Chrome at commit hash 9fc3edbbf2f1.

It seems that the author of the code is not with Chrome anymore.

ProcessMetrics::ProcessMetrics(ProcessHandle process) : last_system_time_(0) {
  if (process) {
    HANDLE duplicate_handle;
    BOOL result = ::DuplicateHandle(::GetCurrentProcess(), process,
                                    ::GetCurrentProcess(), &duplicate_handle,
                                    PROCESS_QUERY_INFORMATION, FALSE, 0);
    DCHECK(result);
    process_.Set(duplicate_handle);
  }
}

The last error is 6, which indicates an invalid handle in the function call. I think there are some other problems with the code above. |duplicate_handle| is not initialized, the ::DuplicateHandle call can fail for any reason so the DCHECK could randomly fire, then |duplicate_handle| may contain garbage, and I did not look what the behavior of the surrounding code is when this handle is null because the duplication fail.


 	base.dll!base::debug::BreakDebugger() Line 21	C++
 	base.dll!logging::LogMessage::~LogMessage() Line 857	C++
>	base.dll!base::ProcessMetrics::ProcessMetrics(process) Line 298	C++
 	base.dll!base::ProcessMetrics::CreateProcessMetrics(process) Line 46	C++
 	chrome.dll!performance_monitor::ProcessMetricsHistory::Initialize(process_data, initial_update_sequence) Line 53	C++
 	chrome.dll!performance_monitor::PerformanceMonitor::MarkProcessAsAlive(process_data, current_update_sequence) Line 134	C++
 	chrome.dll!performance_monitor::PerformanceMonitor::MarkProcessesAsAliveOnUIThread(process_data_list, current_update_sequence) Line 179	C++
 	chrome.dll!base::internal::FunctorTraits<void (performance_monitor::PerformanceMonitor::*)(std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >, int),void>::Invoke<performance_monitor::PerformanceMonitor *,std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >,int>(method, receiver_ptr, args, args) Line 447	C++
 	chrome.dll!base::internal::InvokeHelper<0,void>::MakeItSo<void (performance_monitor::PerformanceMonitor::*)(std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >, int),performance_monitor::PerformanceMonitor *,std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >,int>(functor, args, args, args) Line 530	C++
 	chrome.dll!base::internal::Invoker<base::internal::BindState<void (performance_monitor::PerformanceMonitor::*)(std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >, int),base::internal::UnretainedWrapper<performance_monitor::PerformanceMonitor>,std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >,int>,void ()>::RunImpl<void (performance_monitor::PerformanceMonitor::*)(std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >, int),std::tuple<base::internal::UnretainedWrapper<performance_monitor::PerformanceMonitor>,std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >,int>,0,1,2>(functor, bound, ) Line 604	C++
 	chrome.dll!base::internal::Invoker<base::internal::BindState<void (performance_monitor::PerformanceMonitor::*)(std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >, int),base::internal::UnretainedWrapper<performance_monitor::PerformanceMonitor>,std::unique_ptr<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> >,std::default_delete<std::vector<performance_monitor::ProcessMetricsMetadata,std::allocator<performance_monitor::ProcessMetricsMetadata> > > >,int>,void ()>::RunOnce(base) Line 572	C++
 	base.dll!base::OnceCallback<void ()>::Run() Line 95	C++
 	base.dll!base::debug::TaskAnnotator::RunTask(queue_function, pending_task) Line 61	C++
 	base.dll!base::internal::IncomingTaskQueue::RunTask(pending_task) Line 124	C++
 	base.dll!base::MessageLoop::RunTask(pending_task) Line 395	C++
 	base.dll!base::MessageLoop::DeferOrRunPendingTask(pending_task) Line 410	C++
 	base.dll!base::MessageLoop::DoWork() Line 451	C++
 	base.dll!base::MessagePumpForUI::DoRunLoop() Line 173	C++
 	base.dll!base::MessagePumpWin::Run(delegate) Line 58	C++
 	base.dll!base::MessageLoop::Run(application_tasks_allowed) Line 348	C++
 	base.dll!base::RunLoop::Run() Line 136	C++
 	chrome.dll!ChromeBrowserMainParts::MainMessageLoopRun(result_code) Line 2176	C++
 	content.dll!content::BrowserMainLoop::RunMainMessageLoopParts() Line 1057	C++
 	content.dll!content::BrowserMainRunnerImpl::Run() Line 161	C++
 	content.dll!content::BrowserMain(parameters) Line 46	C++
 	content.dll!content::RunNamedProcessTypeMain(process_type, main_function_params, delegate) Line 423	C++
 	content.dll!content::ContentMainRunnerImpl::Run() Line 703	C++
 	content.dll!content::ContentServiceManagerMainDelegate::RunEmbedderProcess() Line 51	C++
 	embedder.dll!service_manager::Main(params) Line 453	C++
 	content.dll!content::ContentMain(params) Line 19	C++
 	chrome.dll!ChromeMain(instance, sandbox_info, exe_entry_point_ticks) Line 101	C++
 	chrome.exe!MainDllLoader::Launch(instance, exe_entry_point_ticks) Line 198	C++
 	chrome.exe!wWinMain(instance, prev, , ) Line 230	C++
 	chrome.exe!invoke_main() Line 123	C++
 	chrome.exe!__scrt_common_main_seh() Line 283	C++
 	chrome.exe!__scrt_common_main() Line 326	C++
 	chrome.exe!wWinMainCRTStartup() Line 17	C++
 	kernel32.dll!00007ffed6438364()	Unknown
 	ntdll.dll!00007ffed8197091()	Unknown