Icedove account creation not fully functional

Originally created by @Anonymous on #11550 (Redmine)

I’ve tried this today on Tails 2.4:

Add email configuration for openmailbox. I enter my configurations and then tThe test with the password works.
Now I click “ready” and I get this error:

Programming bug. Assertion failed, see log.

When i close the window, my account is correctly created though.

The log said this:

-- Exception object --
+ _message (string) 'Programming bug. Assertion failed, see log.'
+ stack (string) 702 chars
+ constructor (function) 5 lines
+ message (string) 'Programming bug. Assertion failed, see log.'
+ toString (function) 4 lines
*
-- Stack Trace --
Exception@chrome://messenger/content/accountcreation/util.js:132:5
NotReached@chrome://messenger/content/accountcreation/util.js:151:3
assert@chrome://messenger/content/accountcreation/util.js:23:1
SecurityWarningDialog.prototype.needed@chrome://messenger/content/accountcreation/emailWizard.js:1753:1
SecurityWarningDialog.prototype.open@chrome://messenger/content/accountcreation/emailWizard.js:1807:18
EmailConfigWizard.prototype.onCreate@chrome://messenger/content/accountcreation/emailWizard.js:1581:7
oncommand@chrome://messenger/content/accountcreation/emailWizard.xul:1:1
MsgAccountManager@chrome://messenger/content/accountUtils.js:255:1
oncommand@chrome://messenger/content/messenger.xul:1:1
mimeEncrypt.js: module initialized

I’ve seen one other person reporting this on #tails.