There is a fair number of crashes in MockHidConnection::feedReports() on the bots. I saw them on ews115 (macOS-BigSur-Release-WK2-Tests-EWS), but by the numbers, others should be affected too. Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000002, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Trace/BPT trap: 5 Termination Reason: Namespace SIGNAL, Code 0x5 Terminating Process: exc handler [37973] Application Specific Information: CRASHING TEST: /storageAccess/request-and-grant-access-cross-origin-sandboxed-nested-iframe.html Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.WebKit 0x0000000104849181 WebKit::MockHidConnection::feedReports() + 4943 1 com.apple.WebKit 0x0000000104850713 WebKit::CtapHidDriver::Worker::write(WebKit::HidConnection::DataSent) + 419 2 com.apple.WebKit 0x000000010484bbe3 WTF::Detail::CallableWrapper<WebKit::MockHidConnection::send(WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&&, WTF::CompletionHandler<void (WebKit::HidConnection::DataSent)>&&)::$_21::operator()()::'lambda'(), void>::call() + 167 3 com.apple.JavaScriptCore 0x00000001022c4781 WTF::RunLoop::performWork() + 545 4 com.apple.JavaScriptCore 0x00000001022c5032 WTF::RunLoop::performWork(void*) + 34 5 com.apple.CoreFoundation 0x7fff207440dc __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 This is happening on many different tests, entirely unrelated to WebAuthn.
<rdar://problem/96853022>