Stack trace:

[1:1:0731/132043.603311:FATAL:ClassicPendingScript.cpp(172)] Check failed: GetResource()->IsLoaded(). 
  #0 0x7fb74abc64f7 base::debug::StackTrace::StackTrace()
  #1 0x7fb74abe0221 logging::LogMessage::~LogMessage()
  #2 0x7fb74ea57c72 blink::ClassicPendingScript::GetSource()
  #3 0x7fb74f6e9d26 blink::ScriptLoader::ExecuteScriptBlock()
  #4 0x7fb74f6ea24e blink::ScriptLoader::Execute()
  #5 0x7fb74eb193ba blink::ScriptRunner::ExecuteAsyncTask()
  #6 0x7fb74eb18518 blink::ScriptRunner::ExecuteTask()
  #7 0x7fb74abc6c2b base::debug::TaskAnnotator::RunTask()
  #8 0x7fb74a705d75 blink::scheduler::TaskQueueManager::ProcessTaskFromWorkQueue()
  #9 0x7fb74a703994 blink::scheduler::TaskQueueManager::DoWork()
  #10 0x7fb748f0db5e _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMN5media15DecoderSelectorILNS4_13DemuxerStream4TypeE1EEEFvbERKNS_7WeakPtrIS8_EEJbEEEvOT_OT0_DpOT1_
  #11 0x7fb74abc6c2b base::debug::TaskAnnotator::RunTask()
  #12 0x7fb74abe722a base::MessageLoop::RunTask()
  #13 0x7fb74abe7562 base::MessageLoop::DeferOrRunPendingTask()
  #14 0x7fb74abe7844 base::MessageLoop::DoWork()
  #15 0x7fb74abe8ec0 base::MessagePumpDefault::Run()
  #16 0x7fb74abe6def base::MessageLoop::Run()
  #17 0x7fb74ac100a7 base::RunLoop::Run()
  #18 0x7fb74d8ea75d content::RendererMain()
  #19 0x7fb74a82375a content::RunZygote()
  #20 0x7fb74a82403b content::RunNamedProcessTypeMain()
  #21 0x7fb74a824978 content::ContentMainRunnerImpl::Run()
  #22 0x7fb74a82eeb6 service_manager::Main()
  #23 0x7fb74a823422 content::ContentMain()
  #24 0x7fb748dc7394 ChromeMain
  #25 0x7fb747a20f45 __libc_start_main
  #26 0x7fb748dc71f0 <unknown>

This happened on an unrelated tryjob, link to output: https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Ftryserver.chromium.linux%2Flinux_chromium_rel_ng%2F513704%2F%2B%2Frecipes%2Fsteps%2Ftelemetry_perf_unittests__with_patch_%2F0%2Fstdout