Has the page crashed? If yes, can you please check chrome://crashes and post the corresponding server crash id here. Thank you.

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Also, this is when it's in LOCALHOST, not a staging/production environment.  I noticed that if I save changes, and the source code changes, is when it will create the error.

Local Crash ID be781ceb-6b5c-4395-a1e4-899403aedaea

(still being uploaded it says)

Thanks for the quick response. Please post the server id once it uploads.

oh I see - 
Uploaded Crash Report ID abf5e1d8a9cba25f (Local Crash ID: be781ceb-6b5c-4395-a1e4-899403aedaea)

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Thank you. Here's the callstack:

	0x000000010de4ce9c	(Google Chrome Framework -heap_page.h:923 )	blink::HeapAllocator::BackingFree(void*)
0x00000001117bf493	(Google Chrome Framework -vector.h:509 )	blink::MutationObserver::Deliver()
0x00000001117bfa67	(Google Chrome Framework -mutation_observer.cc:365 )	blink::MutationObserver::DeliverMutations()
0x0000000111363c09	(Google Chrome Framework -callback.h:99 )	blink::MicrotaskFunctionCallback(void*)
0x000000010dbc487c	(Google Chrome Framework -runtime-promise.cc:96 )	v8::internal::Runtime_RunMicrotaskCallback(int, v8::internal::Object**, v8::internal::Isolate*)
0x000000010de2038d	(Google Chrome Framework + 0x01dd538d )	v8_Default_embedded_blob_
0x000000010dda2e8d	(Google Chrome Framework + 0x01d57e8d )	v8_Default_embedded_blob_
0x000000203d2052dd		
0x000000010d903d91	(Google Chrome Framework -simulator.h:113 )	v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, bool, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*, v8::internal::Handle<v8::internal::Object>, v8::internal::Execution::MessageHandling, v8::internal::Execution::Target)
0x000000010d904011	(Google Chrome Framework -execution.cc:191 )	v8::internal::Execution::TryCall(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, int, v8::internal::Handle<v8::internal::Object>*, v8::internal::Execution::MessageHandling, v8::internal::MaybeHandle<v8::internal::Object>*, v8::internal::Execution::Target)
0x000000010d904133	(Google Chrome Framework -execution.cc:272 )	v8::internal::Execution::RunMicrotasks(v8::internal::Isolate*, v8::internal::Execution::MessageHandling, v8::internal::MaybeHandle<v8::internal::Object>*)
0x000000010da17de1	(Google Chrome Framework -isolate.cc:3973 )	v8::internal::Isolate::RunMicrotasks()
0x0000000111363b99	(Google Chrome Framework -microtask.cc:44 )	blink::Microtask::PerformCheckpoint(v8::Isolate*)
0x00000001110cc690	(Google Chrome Framework -blink_initializer.cc:72 )	blink::(anonymous namespace)::EndOfTaskRunner::DidProcessTask()
0x000000010e4c8280	(Google Chrome Framework -sequence_manager_impl.cc:552 )	base::sequence_manager::internal::SequenceManagerImpl::NotifyDidProcessTask(base::sequence_manager::internal::SequenceManagerImpl::ExecutingTask*, base::sequence_manager::LazyNow*)
0x000000010e4c7eb5	(Google Chrome Framework -sequence_manager_impl.cc:414 )	base::sequence_manager::internal::SequenceManagerImpl::DidRunTask()
0x000000010e4cffcf	(Google Chrome Framework -thread_controller_impl.cc:184 )	base::sequence_manager::internal::ThreadControllerImpl::DoWork(base::sequence_manager::internal::ThreadControllerImpl::WorkType)
0x000000010e466051	(Google Chrome Framework -callback.h:99 )	base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*)
0x000000010e483f7d	(Google Chrome Framework -message_loop.cc:434 )	base::MessageLoop::RunTask(base::PendingTask*)
0x000000010e4842e2	(Google Chrome Framework -message_loop.cc:445 )	base::MessageLoop::DoWork()
0x000000010e486819	(Google Chrome Framework -message_pump_mac.mm:455 )	base::MessagePumpCFRunLoopBase::RunWork()
0x000000010e478489	(Google Chrome Framework + 0x0242d489 )	base::mac::CallWithEHFrame(void () block_pointer)
0x000000010e48617e	(Google Chrome Framework -message_pump_mac.mm:431 )	base::MessagePumpCFRunLoopBase::RunWorkSource(void*)
0x00007fff3b55e154	(CoreFoundation + 0x00058154 )	__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
0x00007fff3b55e0fa	(CoreFoundation + 0x000580fa )	__CFRunLoopDoSource0
0x00007fff3b541b94	(CoreFoundation + 0x0003bb94 )	__CFRunLoopDoSources0
0x00007fff3b54113d	(CoreFoundation + 0x0003b13d )	__CFRunLoopRun
0x00007fff3b540a27	(CoreFoundation + 0x0003aa27 )	CFRunLoopRunSpecific
0x00007fff3d8a73b9	(Foundation + 0x0001c3b9 )	-[NSRunLoop(NSRunLoop) runMode:beforeDate:]
0x000000010e486e7c	(Google Chrome Framework -message_pump_mac.mm:729 )	base::MessagePumpNSRunLoop::DoRun(base::MessagePump::Delegate*)
0x000000010e485c8d	(Google Chrome Framework -message_pump_mac.mm:184 )	base::MessagePumpCFRunLoopBase::Run(base::MessagePump::Delegate*)
0x000000010e4a8994	(Google Chrome Framework -run_loop.cc:102 )	<name omitted>
0x0000000112895701	(Google Chrome Framework -renderer_main.cc:200 )	content::RendererMain(content::MainFunctionParams const&)
0x000000010e02f010	(Google Chrome Framework -content_main_runner_impl.cc:898 )	content::ContentMainRunnerImpl::Run(bool)
0x000000010fd0012c	(Google Chrome Framework -main.cc:472 )	service_manager::Main(service_manager::MainParams const&)
0x000000010e02e403	(Google Chrome Framework -content_main.cc:19 )	content::ContentMain(content::ContentMainParams const&)
0x000000010c04ecf2	(Google Chrome Framework -chrome_main.cc:101 )	ChromeMain
0x000000010befeab0	(Google Chrome Helper -chrome_exe_main_mac.cc:101 )	main
0x00007fff6871e08c	(libdyld.dylib + 0x0001708c )	start

As per comment #9, as this issue is merged into issue 902832, removing 'Needs-Bisect' label.

Thanks..

Looks like I don't have access to #902832. How can I be kept up to date?

I'm actually not sure if it's the same issue, as issue 902832 seems to be specific to M-72, but this one occurred in M-70. I'm removing the duplicate flag for now.

Issue 912341 has been merged into this issue.

Please re-open if this still happens with M71+. There's nothing we can do about M70 anymore.

as per original submission, it has been happening since upgrading from 68.  It's been visible in 69 & 70.  I will test out 71 and report back if it's still broken

@mlippautz
please reopen.  I have been on 71 for quite some time now. The 10 most recent Chrome crash Report IDs occurred in 71:

Uploaded Crash Report ID 90fb77c1d426c8f3 (Local Crash ID: abd941cd-f36e-4279-a1d2-24aea2e9fe90)

Uploaded Crash Report ID 1646549d05535ec7 (Local Crash ID: a025265e-3e3a-4f40-aa53-f8669e2c9f03)

Uploaded Crash Report ID a9064c11a6e64d6a (Local Crash ID: 50a3483b-7d5a-428c-96a7-e8ea764c908f)

Uploaded Crash Report ID c41510629149e7c4 (Local Crash ID: e87e2e4b-98c2-435d-9e81-97a709937262)

Uploaded Crash Report ID b64e856a5c0351e1 (Local Crash ID: 8661f8b5-3769-4787-9240-78996f1f9f91)

Uploaded Crash Report ID 18d16f46e6055cf1 (Local Crash ID: 3cd6c1a2-2dfb-487b-9170-c8ba4ef2dd36)

Uploaded Crash Report ID ab2425a688ab7c7c (Local Crash ID: 1c66d24f-2c87-4c84-9add-e48c55c8c555)

Uploaded Crash Report ID bc1bc553b24b5fa0 (Local Crash ID: 50667894-3678-4b57-b12d-d632c1150adf)

Uploaded Crash Report ID c96c8bda457af7e1 (Local Crash ID: ee599173-b08d-4d1f-a5fd-ef1259ba8b59)

Uploaded Crash Report ID a2e17c0636101406 (Local Crash ID: 19deecc7-8642-4224-b3b4-fbc351ea0a5d)

Uploaded Crash Report ID d6c0e32ad0fb0358 (Local Crash ID: b56676f3-aa9f-4a65-8df3-156b3bc143d3)