[Webkit-unassigned] [Bug 229769] [ BigSur arm64 Debug EWS ] ASSERTION FAILED: m_uncommittedState.state == State::Provisional

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=229769

--- Comment #6 from Chris Dumez <cdumez at apple.com> ---
The check to discard the DidFailProvisionalLoad IPC from the previous process after a swap looks like so:
```
void WebPageProxy::didFailProvisionalLoadForFrame(FrameIdentifier frameID, FrameInfoData&& frameInfo, WebCore::ResourceRequest&& request, uint64_t navigationID, const String& provisionalURL, const ResourceError& error, WillContinueLoading willContinueLoading, const UserData& userData)
{
    if (m_provisionalPage && m_provisionalPage->navigationID() == navigationID) {
        // The load did not fail, it is merely happening in a new provisional process.
        return;
    }
```

It is a bit fragile. I worry, process A could be sending us a didFailProvisionalLoadForFrame with a navigationID that is 0 or not the navigationID of the provisional frame for some reason.

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