autocrypt setup messages use OpenPGP.js, but are not tested.
OpenPGP addon for Mozilla Thunderbird
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pbrunschwig
EnigmailAutocrypt.createSetupMessage() and EnigmailAutocrypt.handleBackupMessage() both use EnigmailOpenPGP.openpgp but they do not appear to be tested by the unit test suite.
This means that the Autocrypt Setup Message functionality is likely broken on systems like debian that do not ship OpenPGP.js. Please add a unit test that handles these functions!
fixed on master and backported to 2.0-branch.