claws-mail crashed with SIGSEGV in sock_close()

StacktraceTop:session_close (session=0x8586e50) at session.c:329
session_destroy (session=0x8586e50) at session.c:208
imap_handle_error (session=0x876a360, libetpan_errcode=<value optimized out>) at imap.c:551
imap_cmd_noop (session=0x876a360) at imap.c:3446
imap_session_get (folder=0x86d5058) at imap.c:1005

Upstream commit 3.3.1cvs40 possibly fixes that (although it's a strange crash).
http://colino.net/claws-mail/getpatchset.php?ver=3.3.1cvs40

I got this crash again today.
Now I know that it happened while claws-mail tried to get new messages from the IMAP-server from arcor.de.

For reproduction: Click on Inbox, wait till its finished and click again on Inbox and few seconde later on Draws or Trash. For me claws-mails seems to crash when the imap-server doesn't answer and claws-mail gets multiple tasks.

I will keep on trying to reproduce and specify this crash.

Thanks a lot for your work!

It would be nice if you could grab the claws-mail snapshot at http://claws-mail.org/snapshots/, build it, and see if you can reproduce with that version...

Okay, I built the cvs44-snapshot. Until now there's no problem.
I will keep on testing and report tomorrow.
I am a bit irritated by this message I got:
"This connection is configured to be secured using SSL, but SSL is not available in this build of Claws Mail."

Ah, you forgot to install openssl development packages. The easiest for you is to do:
$ sudo apt-get build-dep claws-mail

That'll grab all needed packages to various optional dependancies of Claws;
and then rebuild the snapshot, including the ./configure step.

By the way, if you experience problems with that snapshot, it'll be better to report to upstream bugzilla instead of launchpad:
http://thewildbeast.co.uk/claws-mail/bugzilla/

This bug was fixed in the package claws-mail - 3.3.1-1ubuntu3

---------------
claws-mail (3.3.1-1ubuntu3) hardy; urgency=low

  * Fixing some serious crasher bugs (LP: #208230)
    Thanks to Colin Leroy <email address hidden> from Claws Mail for preparing the
    patches, to not let claws-mail in terrible state for Ubuntu 8.04 LTS
  * debian/patches/fix_crash_saving_draft_mail_on_slow_imap_link.patch
    - Fixes: crash when saving to drafts on slow IMAP link and closing the window
      during save. (Upstream Bug: 1534)
  * debian/patches/fix_cant_mark_mails_as_read_on_some_imap_srvs.patch:
    - Fixes: Can't mark mails as read on some IMAP servers. (Upstream Bug:
      1533)
  * debian/patches/crash_on_failure_to_write_IMAP_message_to_disk.patch:
    - Fixes: crash on failure to write IMAP message to disk (Upstream Bug:
      1515)
  * debian/patches/fix_possible_crash_when_trying_to_parse_null_date.patch:
    - Prevent possible crash when trying to parse NULL dates.
  * debian/patches/fix_crash_on_socket_close.patch: (LP: #204290)
    - Fixes crash on socket close.
  * debian/patches/fix_crash_when_deleting_a_whole_adressbook_folder.patch:
    - Fix crash when deleting a whole adressbook folder.
  * debian/patch/fix_crash_when_starting_with_homedir_full.patch:
    - Fix crash when starting with /home is full.
    - RedHat Bug: #431735
  * debian/patches/fix_window_handling_on_startup.patch:
    - Fix windows handling on startup, so that the Claws Mail taskbar entry
      doesn't blink.
  * debian/patches/fix_unscrollable_folder.patch: (LP: #189569)
    - Fix unscrollable folder list when starting minimized to tray.
  * debian/patches/fix_filtering_rule_handling.patch:
    - Fill in destination correctly when re-editing a re-send filtering rule.
  * debian/patches/remove_raw_printf_from_imap_fetch_code.patch:
    - Remove a raw printf from IMAP fetch code.
  * debian/patches/fix_html_display_for_seamonkey.patch:
    - Strip MIME subtype to workaround some sender MUAs bugs. Fixes html
      display from Seamonkey.
  * debian/patches/use_folder_set_account.patch:
    - Use folder-set account if specified when using right-click->Compose
      Email on an email address.

 -- Stephan Hermann <email address hidden> Sat, 29 Mar 2008 11:20:39 +0100

GOTSCHA!
Hello Colin, you fixed the problem in snapshot cvs44.
I built claws-mail again and tried everything to reproduce the failure. It is not reproducable.
Claws-Mail works very good since snapshot cvs44!

Thank you very much! Best Regards.

Leu: great, thanks. The fix is in 3.3.1-1ubuntu3 uploaded by Stephan Hermann today, so, when you'll be able to do an apt update, you should uninstall the snapshot with:
$ sudo make uninstall

Thanks for the feedback :)