When sending an invalid message using the IPC testing API, the WebContent process will crash. IPC.sendSyncMessage('UI',IPC.webPageProxyID,IPC.messages.WebPageProxy_ExecuteSavedCommandBySelector.name, 1, [{type: 'String',value: 'AAA'}]);
Created attachment 441965 [details] Patch
<rdar://70334824>
Created attachment 441967 [details] Patch
Comment on attachment 441967 [details] Patch r=mews
Created attachment 442228 [details] Patch
Committed r284746 (243455@main): <https://commits.webkit.org/243455@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 442228 [details].