#831 Thunderbird freezes at displaying a message with an encrypted e-mail attached

[d. matter]

Hi,

I encountered the problem, that Thunderbird freezes for a certain amount of time if I try to open (i.e. read) an E-Mail with an encrypted E-Mail attached.

Steps to reproduce:

1. Enable the option "Store drafts encrypted"
2. Create a new e-mail (#1), store it as draft
3. Create another new e-mail (#2) attach e-mail #1, send it to yourself
4. Open e-mail #2

Result

• Fan enganges -> one cpu core temporarily has 100% load

• Thunderbird freezes for a certain amount of time, sometimes it recovers, sometimes not

  • if it does not recover, an error message appears:

    A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.

• examples for non-responsive skripts (they vary):

  • Skript: chrome://messenger/content/mailWidgets.xml:448
  • Skript: chrome://messenger/content/msgHdrViewOverlay.js:640
• e-mail #2 is seemingly some hundred times (exact number varies, e.g. 694) attached to e-mail #1

Tests

• tested two e-mail adresses at to different e-mail providers (same result)
• it has no effect to toggle "download attachements only if they should be displayed"
• it does not matter if e-mail #1 is encrypted or not
• it does not matter if e-mail #1 or e-mail #2 have a subject or contain an actual message
• if I attach an encrypted file, the problem does not occur
• if the attached e-mail is not encrypted, the problem does not occur

Additional Information

• Thunderbird starts to freeze after I typed in my GPG-Passphrase, i.e. after Thunderbird tried to decrypt the attachment
• e-mails are composed in plain-text format, no html

edit: improved formatting

[Patrick Brunschwig]

That's fixed on master and will be part of the next release.