Test imported/w3c/web-platform-tests/FileAPI/reading-data-section/filereader_abort.html crashes frequently on iOS Simulator Debug Wk2 Flakiness Dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2FFileAPI%2Freading-data-section%2Ffilereader_abort.html Curiously enough the crash log reports CRASHING TEST as "imported/mozilla/svg/smil/style/anim-css-fontsize-1-from-to-px-px-expected.svg" Sample CrashLog: https://build.webkit.org/results/Apple%20iOS%2011%20Simulator%20Debug%20WK2%20(Tests)/r233426%20(5169)/imported/w3c/web-platform-tests/FileAPI/reading-data-section/filereader_abort-crash-log.txt Process: com.apple.WebKit.WebContent.Development [4229] Path: /Volumes/VOLUME/*/WebKit.framework/XPCServices/com.apple.WebKit.WebContent.xpc/com.apple.WebKit.WebContent.Development Identifier: com.apple.WebKit.WebContent.Development Version: 606+ (606.1.20+) Code Type: X86-64 (Native) Parent Process: launchd_sim [96672] Responsible: com.apple.WebKit.WebContent.Development [4229] User ID: 501 Date/Time: 2018-07-02 11:25:31.940 -0700 OS Version: Mac OS X 10.13.4 (17E202) Report Version: 12 Anonymous UUID: 628480A6-E7E2-AA80-1638-0BF1D7734AC5 Time Awake Since Boot: 5800000 seconds System Integrity Protection: disabled Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [0] VM Regions Near 0xbbadbeef: --> __TEXT 000000010db74000-000000010db77000 [ 12K] r-x/rwx SM=COW /Volumes/VOLUME/*/WebKit.framework/XPCServices/com.apple.WebKit.WebContent.xpc/com.apple.WebKit.WebContent.Development Application Specific Information: CRASHING TEST: imported/mozilla/svg/smil/style/anim-css-fontsize-1-from-to-px-px-expected.svg CoreSimulator 518.19 - Device: Managed 4 - Runtime: iOS 11.3 (15E217) - DeviceType: iPhone 5s Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 JavaScriptCore 0x000000011bc71080 WTFCrash + 16 (Assertions.cpp:267) 1 com.apple.WebCore 0x00000001214712f0 WebCore::FileReader::abort()::$_8::operator()(WebCore::ScriptExecutionContext&) const + 80 (FileReader.cpp:157) 2 com.apple.WebCore 0x0000000121471274 WTF::Function<void (WebCore::ScriptExecutionContext&)>::CallableWrapper<WebCore::FileReader::abort()::$_8>::call(WebCore::ScriptExecutionContext&) + 52 (Function.h:101) 3 com.apple.WebCore 0x0000000120b769ce WTF::Function<void (WebCore::ScriptExecutionContext&)>::operator()(WebCore::ScriptExecutionContext&) const + 158 (Function.h:56) 4 com.apple.WebCore 0x0000000120b643dd WebCore::ScriptExecutionContext::Task::performTask(WebCore::ScriptExecutionContext&) + 29 (ScriptExecutionContext.h:188) 5 com.apple.WebCore 0x0000000121201796 WebCore::Document::postTask(WebCore::ScriptExecutionContext::Task&&)::$_3::operator()() + 278 (Document.cpp:5853) 6 com.apple.WebCore 0x00000001212015d9 WTF::Function<void ()>::CallableWrapper<WebCore::Document::postTask(WebCore::ScriptExecutionContext::Task&&)::$_3>::call() + 25 (Function.h:101) 7 JavaScriptCore 0x000000011bc961cb WTF::Function<void ()>::operator()() const + 139 (Function.h:56) 8 JavaScriptCore 0x000000011bcc11ab WTF::dispatchFunctionsFromMainThread() + 331 (MainThread.cpp:129) 9 JavaScriptCore 0x000000011bcc3db5 -[JSWTFMainThreadCaller call] + 21 (MainThreadMac.mm:55) 10 com.apple.Foundation 0x000000010dc66d5e __NSThreadPerformPerform + 330 11 com.apple.CoreFoundation 0x0000000113214bb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 12 com.apple.CoreFoundation 0x00000001131f94af __CFRunLoopDoSources0 + 271 13 com.apple.CoreFoundation 0x00000001131f8a6f __CFRunLoopRun + 1263 14 com.apple.CoreFoundation 0x00000001131f830b CFRunLoopRunSpecific + 635 15 com.apple.Foundation 0x000000010dc21b4a -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 274 16 com.apple.Foundation 0x000000010dc21a25 -[NSRunLoop(NSRunLoop) run] + 76 17 libxpc.dylib 0x0000000114e208c9 _xpc_objc_main + 460 18 libxpc.dylib 0x0000000114e22d73 xpc_main + 143 19 com.apple.WebKit.WebContent 0x000000010db75c0e main + 894 20 libdyld.dylib 0x0000000114a68955 start + 1
*** Bug 187265 has been marked as a duplicate of this bug. ***
> CRASHING TEST: imported/mozilla/svg/smil/style/anim-css-fontsize-1-from-to-px-px-expected.svg This crash log blames a different test. Which one is the actual culprit?
(In reply to Alexey Proskuryakov from comment #2) > > CRASHING TEST: imported/mozilla/svg/smil/style/anim-css-fontsize-1-from-to-px-px-expected.svg > > This crash log blames a different test. Which one is the actual culprit? We suspect the imported/w3c/web-platform-tests/FileAPI/reading-data-section/filereader_abort.html test is in fact the actual failure because it showed up as such in the stderr. But I did find it curious that the log referenced a different test, one theory is that there's a flaw in the test runner related to state. (possibly not reporting what test we are running early enough)
It looks like the crashes with that FileAPI test started on 6/8, which may line up with this WPT repo sync (which included other FileAPI tests): https://trac.webkit.org/changeset/232641/webkit
David, can you try to reproduce this? If we can narrow it down to a particular test, we can go ahead and skip it.
(In reply to Ryan Haddad from comment #5) > David, can you try to reproduce this? If we can narrow it down to a > particular test, we can go ahead and skip it. okay working on this now.
Attempted to repro this locally and it crashed with different errors each time...continuing to investigate.
I went ahead and skipped imported/w3c/web-platform-tests/FileAPI/reading-data-section/filereader_abort.html in https://trac.webkit.org/changeset/234565/webkit because we keep seeing it come up.
We are seeing this with multiple tests, or perhaps I didn't skip the real culprit. Example with imported/w3c/web-platform-tests/FileAPI/reading-data-section/filereader_error.html: https://build.webkit.org/results/Apple%20iOS%2011%20Simulator%20Debug%20WK2%20(Tests)/r234614%20(5755)/results.html