A few times I have accidentally clicked away or closed the inspector when this was showing, but I didn't mean to. Saving the data as JSON in a WebInspector setting ("last-uncaught-exception-data" or similar) would be nice. We could have a DebugUI-introduced function that will list saved reports to console for follow-up reporting.
<rdar://problem/26498383>
<rdar://problem/26499108>