So you have a Structure S. S is on the mark stack. Then: 1. S grabs its lock 2. S adds a new property transition 3. We find out we need to do some incremental marking 4. We mark S 5. visitChildren on S will try to grab its lock 6. We are now in a deadlock
Created attachment 362257 [details] patch
Comment on attachment 362257 [details] patch r=me
Comment on attachment 362257 [details] patch Clearing flags on attachment: 362257 Committed r241655: <https://trac.webkit.org/changeset/241655>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48150864>