In AXIsolatedTree::updateChildren, the children of the parameter axObject can be invalidated as we iterate over them
<rdar://problem/99056820>
Created attachment 461833 [details] Patch
Committed 253738@main (e2c29dcf4754): <https://commits.webkit.org/253738@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 461833 [details].