[Webkit-unassigned] [Bug 210433] New: REGRESSION: [ Mac wk2 ] WebKit::ViewGestureController::handleSwipeGesture(WebKit::WebBackForwardListItem*, double, WebKit::ViewGestureController::SwipeDirection) - flaky crashes.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=210433

            Bug ID: 210433
           Summary: REGRESSION: [ Mac wk2 ]
                    WebKit::ViewGestureController::handleSwipeGesture(WebK
                    it::WebBackForwardListItem*, double,
                    WebKit::ViewGestureController::SwipeDirection) -
                    flaky crashes.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Lawrence.j at apple.com

Created attachment 396297

  --> https://bugs.webkit.org/attachment.cgi?id=396297&action=review

basic-cached-back-swipe-crash-log

swipe/basic-cached-back-swipe.html

Description:
This test is flaky crashing and timing out on Mac wk2. The flaky crashes appear in the visual history on 04/09/2020.

History:
https://results.webkit.org/?suite=layout-tests&test=swipe%2Fbasic-cached-back-swipe.html&flavor=wk2&platform=mac&limit=50000

Crash log attached;

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore            0x0000000107c71f5e WTFCrash + 14 (Assertions.cpp:309)
1   com.apple.WebKit                    0x0000000117a446cb WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebKit                    0x0000000118b569bd WebKit::ViewGestureController::handleSwipeGesture(WebKit::WebBackForwardListItem*, double, WebKit::ViewGestureController::SwipeDirection) + 125 (ViewGestureControllerMac.mm:552)
3   com.apple.WebKit                    0x0000000118b540b4 invocation function for block in WebKit::ViewGestureController::trackSwipeGesture(NSEvent*, WebKit::ViewGestureController::SwipeDirection, WTF::RefPtr<WebKit::WebBackForwardListItem, WTF::DumbPtrTraits<WebKit::WebBackForwardListItem> >) + 244 (ViewGestureControllerMac.mm:314)
4   com.apple.AppKit                    0x00007fff32027276 ___trackSwipeWithScrollEvent_block_invoke + 2431
5   com.apple.AppKit                    0x00007fff31dba5e2 _NSSendEventToObservers + 323
6   com.apple.AppKit                    0x00007fff31db90a6 -[NSApplication(NSEvent) sendEvent:] + 82
7   WebKitTestRunner                    0x000000010792b62e -[EventStreamPlayer playbackTimerFired:] + 1710 (EventSerializerMac.mm:305)
8   com.apple.Foundation                0x00007fff3708a3ca __NSFireTimer + 67
9   com.apple.CoreFoundation            0x00007fff349b39b9 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
10  com.apple.CoreFoundation            0x00007fff349b351f __CFRunLoopDoTimer + 859
11  com.apple.CoreFoundation            0x00007fff349b3007 __CFRunLoopDoTimers + 322
12  com.apple.CoreFoundation            0x00007fff34997daa __CFRunLoopRun + 1871
13  com.apple.CoreFoundation            0x00007fff34996ffe CFRunLoopRunSpecific + 462
14  com.apple.Foundation                0x00007fff3702b2a8 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
15  WebKitTestRunner                    0x000000010797ec9e WTR::TestController::platformRunUntil(bool&, WTF::Seconds) + 302 (TestControllerCocoa.mm:212)
16  WebKitTestRunner                    0x000000010793c22f WTR::TestController::runUntil(bool&, WTF::Seconds) + 79 (TestController.cpp:1850)
17  WebKitTestRunner                    0x0000000107984762 WTR::TestInvocation::invoke() + 450 (TestInvocation.cpp:185)
18  WebKitTestRunner                    0x0000000107945f26 WTR::TestController::runTest(char const*) + 534 (TestController.cpp:1779)
19  WebKitTestRunner                    0x00000001079469c6 WTR::TestController::runTestingServerLoop() + 214 (TestController.cpp:1825)
20  WebKitTestRunner                    0x000000010793cc07 WTR::TestController::run() + 39 (TestController.cpp:1833)
21  WebKitTestRunner                    0x000000010793c57d WTR::TestController::TestController(int, char const**) + 813 (TestController.cpp:168)
22  WebKitTestRunner                    0x000000010793ccd3 WTR::TestController::TestController(int, char const**) + 35 (TestController.cpp:169)
23  WebKitTestRunner                    0x0000000107910b9c main + 108 (main.mm:70)
24  libdyld.dylib                       0x00007fff6e8e0cc9 start + 1

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