[Webkit-unassigned] [Bug 193701] New: STP: Occasional WebProcess hangs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193701

            Bug ID: 193701
           Summary: STP: Occasional WebProcess hangs
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Major
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jon at jonshier.com

Created attachment 359826

  --> https://bugs.webkit.org/attachment.cgi?id=359826&action=review

spindump of apparently hung WebProcess

Sorry for the non-descriptive title.

For the last couple STP builds I've noticed a tab hanging problem. This usually occurs after I Google something, navigate back to the search results, and then try to navigate to another result. I lose interactivity with the web content (no hover behavior, no selection, but scrolling still works) and when I try to reload, the tab beachballs. However, it isn't only on Google results as I just saw it on aviation.stackexchange.com. I went to a topic, navigated back to root, then tried to go to another topic and I lost interactivity. Attempting to reload produced the beachball. This has happened on multiple machines, Mojave, STP ~71 - 73. Safari UI is still fully functional, so closing the tab makes the beachball go away.

Attached is a spindump from the aviation.stackexchange.com WebProcess.

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