[Webkit-unassigned] [Bug 232502] New: Monterey crash in WebKit::DisplayLink::addObserver

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=232502

            Bug ID: 232502
           Summary: Monterey crash in WebKit::DisplayLink::addObserver
           Product: WebKit
           Version: Other
          Hardware: Mac (Intel)
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bya at 180g.co

Created attachment 442847

  --> https://bugs.webkit.org/attachment.cgi?id=442847&action=review

Text contained in the Apple crash dialog

OK. This is a weird one.

We have an application, Vellum, that uses WKWebViews on Monterey to generate a PDF. I hit some very strange crashes in WebKit::DisplayLink::addObserver (see attached stack traces) as well as WebKit::DisplayLink::setPreferredFramesPerSecond (see attached screenshot – forgot to copy the text). 

Here’s the weird part: I could only get these crashes to occur when playing something via Spotify (!). In particular, I found that it happens when I am playing Shackleton’s “Something Tells Me / Pour Out Like Water” track off of “Departing Like Rivers” album (!!!). 

I tried other tracks on other albums, and couldn’t get it to happen. Now, I don’t think that this is Shackleton-specific (though wouldn’t that be a great bug?!). But maybe the fact that this track is 12 minutes long is affecting something? Why Spotify should be affecting OUR application, though, is a mystery.

Since I hit these crashes in the Monterey Beta, we’ve noticed similar stack traces in our crash reporting database. So, this means that users who are now upgrading to Monterey are hitting this too.

I haven’t tried to reproduce this yet via a smaller test app. If you are going to try to reproduce this issue, please let me know and I can provide you with an evaluation license so you can generate via Vellum. Here’s where you can download our application:
https://vellum.pub

It’s free to download, but you won’t be able to generate books without a license.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20211029/c08b00e2/attachment.htm>