crash log for renderer (pid <unknown>):
STDOUT: 
STDERR: [1:1:0329/150504.839333:2950971046:FATAL:WebPagePopupImpl.cpp(566)] Check failed: isAcceleratedCompositingActive(). 
STDERR: #0 0x000001acfd67 base::debug::StackTrace::StackTrace()
STDERR: #1 0x000001ae73fb logging::LogMessage::~LogMessage()
STDERR: #2 0x000002c17848 blink::WebPagePopupImpl::compositeAndReadbackAsync()
STDERR: #3 0x000004387da4 test_runner::DumpPixelsAsync()
STDERR: #4 0x000004358c21 test_runner::TestRunner::DumpPixelsAsync()
STDERR: #5 0x000001aa21a8 content::BlinkTestRunner::CaptureDumpContinued()
STDERR: #6 0x000001aa1c78 content::BlinkTestRunner::OnLayoutDumpCompleted()
STDERR: #7 0x000001a9f5cd content::BlinkTestRunner::CaptureDump()
STDERR: #8 0x0000043532da test_runner::TestRunner::NotifyDone()
STDERR: #9 0x00000434ca0f test_runner::TestRunnerBindings::NotifyDone()
STDERR: #10 0x00000435b5ed gin::internal::Dispatcher<>::DispatchToCallback()
STDERR: #11 0x00000085e0b3 v8::internal::FunctionCallbackArguments::Call()
STDERR: #12 0x00000095f357 v8::internal::(anonymous namespace)::HandleApiCallHelper<>()
STDERR: #13 0x00000095dce2 v8::internal::Builtin_Impl_HandleApiCall()
STDERR: #14 0x23165a084264 <unknown>
STDERR: 
