[237:237:0527/001625.677632:FATAL:third_party/blink/renderer/core/html/html_frame_owner_element.cc:214] Security CHECK failed: !ContentFrame() || GetDocument().StatePreservingAtomicMoveInProgress(). Received signal 6 [146:146:0527/001625.716464:INFO:CONSOLE:11] "iframe.contentWindow before move: true", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.716590:INFO:CONSOLE:11] "moveBefore threw: NotFoundError: Failed to execute 'moveBefore' on 'Element': The node before which the new node is to be inserted is not a child of this node.", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.716636:INFO:CONSOLE:11] "moving.parentNode after move: null", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.717150:INFO:CONSOLE:11] "moving.isConnected: false", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.717219:INFO:CONSOLE:11] "iframe.contentWindow after move: LIVE (orphaned LocalFrame)", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.717260:INFO:CONSOLE:11] "ref.parentNode after move: null", source: http://127.0.0.1:8080/poc.html (11) [146:146:0527/001625.717345:INFO:CONSOLE:11] "Re-inserting detached subtree -> SECURITY_CHECK ...", source: http://127.0.0.1:8080/poc.html (11) === Symbolized crash stack === #0 blink::HTMLFrameOwnerElement::InsertedInto(blink::ContainerNode&) third_party/blink/renderer/core/html/html_frame_owner_element.cc:213 #1 blink::HTMLFrameElementBase::InsertedInto(blink::ContainerNode&) third_party/blink/renderer/core/html/html_frame_element_base.cc:181 #2 blink::HTMLIFrameElement::InsertedInto(blink::ContainerNode&) third_party/blink/renderer/core/html/html_iframe_element.cc:534 #3 blink::ContainerNode::NotifyNodeInsertedInternal(...) third_party/blink/renderer/core/dom/container_node.cc:1398 #4 blink::ContainerNode::InsertNodeVector(...) third_party/blink/renderer/core/dom/container_node.cc:407 #5 blink::ContainerNode::AppendChild(blink::Node*, ...) third_party/blink/renderer/core/dom/container_node.cc:1225 #6 v8_node::AppendChildOperationCallbackForMainWorld(...) gen/.../v8_node.cc:524