Currently, the observer member is checked inside the loop iterating over all the keys, but this check should be moved outside of the loop.
Created attachment 401586 [details] Patch
Comment on attachment 401586 [details] Patch Thanks for reviewing!
Committed r262865: <https://trac.webkit.org/changeset/262865> All reviewed patches have been landed. Closing bug and clearing flags on attachment 401586 [details].
<rdar://problem/64227791>