I wrote a layout test for https://bugs.webkit.org/show_bug.cgi?id=183972 and I spent some time trying to get it to crash without the patch. But I could not get the test to crash so I went ahead and I landed r230063. I then realized it is actually worthy to add such test to ensure the SVG tear-off objects are more robust.
Created attachment 336816 [details] Patch
Created attachment 336853 [details] Patch
I'm not sure why this patch is still stuck waiting for EWS. I released all the locks and resubmitted it, but apparently that didn't help.
Comment on attachment 336853 [details] Patch Thanks for taking the time to write a test! r=me
Committed r230172: <https://trac.webkit.org/changeset/230172>
<rdar://problem/39114918>
(In reply to Ryan Haddad from comment #3) > I'm not sure why this patch is still stuck waiting for EWS. I released all > the locks and resubmitted it, but apparently that didn't help. This is hitting https://bugs.webkit.org/show_bug.cgi?id=171463 (<rdar://problem/31894087>). The issue is that the bug title contains another bug id which confuses EWS.