I have had it a few times that the error reporter pops up, but trying to send a report will crash both it and mantid. This is both in the workbench and mantidplot. I’m running nightly from March 12th. Often when mantid fully closes after the crash, the error reporter pops up again, but will again crash when interacted with. This often gets in the way of trying to restart mantid and may cause iterative crashes depending on timing I think
The development team has investigated this. It was found that if an error was thrown when attempting to package some error reporting data that a error was not being caught and handled properly.
We believe that this should have been fixed just before released and should work fine in release v4.0 of Mantid.