Chrome Version: 65.0.3293.0 with DCHECK enabled
OS: Linux

1. Visit chrome://webrtc-internals/
2. Click "Create Dump"
3. Click a checkbox
4. Dismiss the file dialog with Cancel
5. Click the same checkbox again

[253630:253630:1212/151700.601975:FATAL:webrtc_internals.cc(359)] Check failed: !select_file_dialog_.
#0 0x7f68abec72cc base::debug::StackTrace::StackTrace()
#1 0x7f68abef121c logging::LogMessage::~LogMessage()
#2 0x7f68a9a7db55 content::WebRTCInternals::EnableLocalEventLogRecordings()
#3 0x7f68a9a5f4c5 content::WebUIImpl::ProcessWebUIMessage()
#4 0x7f68a9a5e600 _ZN3IPC8MessageTI27FrameHostMsg_WebUISend_MetaNSt3__15tupleIJ4GURLNS2_12basic_stringIcNS2_11char_traitsIcEENS2_9allocatorIcEEEEN4base9ListValueEEEEvE8DispatchIN7content9WebUIImplESH_NSG_15RenderFrameHostEMSH_FvPSI_RKS4_RKSA_RKSC_EEEbPKNS_7MessageEPT_PT0_PT1_T2_
#5 0x7f68a9a5e519 content::WebUIImpl::OnMessageReceived()
#6 0x7f68a9a2a542 content::WebContentsImpl::OnMessageReceived()
#7 0x7f68a96c6bfd content::RenderFrameHostImpl::OnMessageReceived()
#8 0x7f68a98e5d9d content::RenderProcessHostImpl::OnMessageReceived()
#9 0x7f68ab0aa2a1 IPC::ChannelProxy::Context::OnDispatchMessage()
#10 0x7f68ab0ad238 _ZN4base8internal7InvokerINS0_9BindStateIMN3IPC12ChannelProxy7ContextEFvRKNS3_7MessageEEJ13scoped_refptrIS5_ES6_EEEFvvEE3RunEPNS0_13BindStateBaseE
#11 0x7f68abec7bea base::debug::TaskAnnotator::RunTask()
#12 0x7f68abefaa26 base::internal::IncomingTaskQueue::RunTask()
#13 0x7f68abefeb17 base::MessageLoop::RunTask()
...