Chrome Version       : 66.0.3329.0
OS Version: 10352.0.0
URLs (if applicable) :

What steps will reproduce the problem?
1. Enable magic tether on your primary session 
2. Sign in into secondary ChromeOS session (aka multi-profile or multi-signin) 
3. Try to open settings from the secondary session's desktop

What is the expected result?

No crash


What happens instead of that?

Bang. 100% repro. See https://crash.corp.google.com/browse?q=reportid=%272a5ac4c0a629311a%27#0.

Report ID: 2a5ac4c0a629311a
Product, version: Chrome_ChromeOS, 66.0.3329.0
Process type: browser
Magic Signature: dbus::AppendBasicTypeValueDataAsVariant
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Stable Signature: struct_reader_next-d0f1826eedit bugs&comments
Report Time: Mon, 12 Feb 2018 20:40:12 GMT
Process uptime: 16 sec, 393 ms
Client ID: 81b3879a7698463e8405dd06204165dc
In shutdown: false
Device Mode: leve-signed-mpkeys
Thread 0 (id: 2318) CRASHED [SIGSEGV @ 0x00007ffc5c90fff8 ] MAGIC SIGNATURE THREAD
Stack Quality100%Show frame trust levels
0x000078cdf4ed3189	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:508 )	struct_reader_next
0x000078cdf4ed1e44	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:1070 )	_dbus_type_reader_next
0x000078cdf4ed3bf8	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:2633 )	writer_write_reader_helper
0x000078cdf4ed3af2	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:2526 )	writer_write_reader_helper
0x000078cdf4ed3af2	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:2526 )	writer_write_reader_helper
0x000078cdf4ed2dea	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:2698 )	_dbus_type_writer_write_reader_partial
0x000078cdf4ed223e	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:1197 )	replacement_block_replace
0x000078cdf4ed20b7	(libdbus-1.so.3.14.8 -dbus-marshal-recursive.c:1303 )	_dbus_type_reader_set_basic
0x000078cdf4ed10ef	(libdbus-1.so.3.14.8 -dbus-marshal-header.c:373 )	_dbus_header_set_field_basic
0x000078cdf4ed83cf	(libdbus-1.so.3.14.8 -dbus-message.c:2620 )	dbus_message_iter_close_container
0x000059ccb6551295	(chrome -message.cc:568 )	std::__1::__map_value_compare<std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >, std::__1::__value_type<std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >, int>, std::__1::less<std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > >, true>::operator()(std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> > const&, std::__1::__value_type<std::__1::basic_string<unsigned short, base::string16_internals::string16_char_traits, std::__1::allocator<unsigned short> >, int> const&) const
0x000059ccb655f336	(chrome -values_util.cc:258 )	dbus::AppendBasicTypeValueDataAsVariant(dbus::MessageWriter*, base::Value const&)
0x000059ccb6541a4e	(chrome -shill_client_helper.cc:439 )	chromeos::(anonymous namespace)::AppendValueDataAsVariantInternal(dbus::MessageWriter*, base::Value const&, chromeos::(anonymous namespace)::DictionaryType)
0x000059ccb64fab5a	(chrome -shill_device_client.cc:78 )	chromeos::(anonymous namespace)::ShillDeviceClientImpl::SetProperty(dbus::ObjectPath const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, base::Value const&, base::RepeatingCallback<void ()> const&, base::RepeatingCallback<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)> const&)
0x000059ccb651c3cf	(chrome -network_device_handler_impl.cc:117 )	chromeos::(anonymous namespace)::SetDevicePropertyInternal(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, base::Value const&, base::RepeatingCallback<void ()> const&, base::RepeatingCallback<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::unique_ptr<base::DictionaryValue, std::__1::default_delete<base::DictionaryValue> >)> const&)
0x000059ccb651e150	(chrome -network_device_handler_impl.cc:563 )	chromeos::NetworkDeviceHandlerImpl::ApplyMACAddressRandomizationToShill()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
... 53 more
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccb4da2b02	(chrome -tether_service.cc:394 )	TetherService::UpdateTetherTechnologyState()
0x000059ccb4da2802	(chrome -tether_service.cc:357 )	TetherService::UpdateEnabledState()
0x000059ccb6460ced	(chrome -network_state_handler.cc:1523 )	chromeos::NetworkStateHandler::NotifyDeviceListChanged()
0x000059ccbaa70013	(chrome + 0x07e20013 )	_fini