RE: Cannot Read Mailbox

[John Frankish <j-frankish slb com>]

> > > On 01/02/2014 04:39:44 AM Thu, John Frankish wrote:
> > > Hi,
> > >
> > > Using balsa-2.5.1 with gtk3, I set up a pop3 account.
> > >
> > > 2. After successfully downloading the mail, I clicked on "mailbox"
> > > to start reading my inbox, but the moving blue "wait" animation
> > > shows in the bottom left hand corner and no mails are displayed.
> > > Closing balsa and starting from the command line does not give any
> > > error messages and the contents of the inbox are still not displayed.
> > >
> > >  As the 300+ emails have been deleted from the server, I would like
> > > to be able to fix this - does anybody have any trouble-shooting hints?
> >
> > Is the mailbox file stored somewhere with slow access?  An mbox file
> > of that size should be read from a local drive in a second or two at most.
>
> The mailbox file is stored on a local drive
>
> > Does 'top' show Balsa using 100% cpu?
>
> No, about 12%, which equates to one cpu core
>
> > If so, it may be stuck in a loop parsing the file; if not, it must be
> > blocked from some action.  You could try running under gdb, interrupt
> > it with ctrl-C, and get the stack trace with 'bt'--that might show
> > what Balsa was trying to do.  Write back with what you see...
>
> Not too many clues from gdb, but here it is anyway:
>
> $ gdb balsa
>
> (gdb) run balsa
> Starting program: /usr/local/bin/balsa balsa
> warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff4059f000
> warning: Could not load shared library symbols for linux-vdso.so.1.
> Do you need "set solib-search-path" or "set sysroot"?
> warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be 
> available.
> ** Message: init gpgme version 1.4.3
> ** Message: protocol OpenPGP: engine /usr/local/bin/gpg2 (home (null), version 2.0.22)
> ** Message: protocol CMS: engine /usr/local/bin/gpgsm (home (null), version 2.0.22)
> ** Message: protocol GPGCONF: engine /usr/local/bin/gpgconf (home (null), version 2.0.22)
> ** Message: protocol Assuan: engine /home/tc/.gnupg/S.gpg-agent (home !GPG_AGENT, version 1.0)
> ** Message: OpenPGP protocol supported
> ** Message: CMS (aka S/MIME) protocol supported Network is available
> (1388752939) [click on inbox, nothing happens] ^C Program received signal SIGINT, Interrupt.
> 0x00007f75a2f53dfd in poll () from /lib/libc.so.6
> (gdb) bt
> #0  0x00007f75a2f53dfd in poll () from /lib/libc.so.6
> #1  0x00007f75a3676add in ?? () from /usr/local/lib/libglib-2.0.so.0
> #2  0x00007f75a3676c0a in g_main_loop_run () from /usr/local/lib/libglib- 2.0.so.0
> #3  0x00007f75ad87404a in gtk_main () from /usr/local/lib/libgtk-3.so.0
> #4  0x00000000004afbcc in ?? ()
> #5  0x00007f75a3f52cdc in ffi_call_unix64 () from /usr/local/lib/libffi.so.6
> #6  0x00007f75a3f52970 in ffi_call () from /usr/local/lib/libffi.so.6
> #7  0x00007f75a416980a in g_cclosure_marshal_generic () from /usr/local/lib/libgobject-2.0.so.0
> #8  0x00007f75a417077d in g_closure_invoke () from /usr/local/lib/libgobject- 2.0.so.0
> #9  0x00007f75a4165afb in ?? () from /usr/local/lib/libgobject-2.0.so.0
> #10 0x00007f75a416c717 in g_signal_emit_valist () from /usr/local/lib/libgobject-2.0.so.0
> #11 0x00007f75a417efde in g_signal_emit () from /usr/local/lib/libgobject- 2.0.so.0
> #12 0x00007f75a45e1c4e in g_application_run () from /usr/local/lib/libgio- 2.0.so.0
> #13 0x0000000000426d6e in ?? ()
> #14 0x00007f75a2eb9468 in __libc_start_main () from /lib/libc.so.6
> #15 0x0000000000426db1 in ?? ()

To add to this, I tried using claws-mail "import mbox folder" and was able to successfully import the balsa 
inbox without errors.

I tried two tests to export the inbox from claws-mail to mbox format:

1. All emails - balsa was unable to open the inbox

2. All emails less 9 mails that showed "no subject" and "no date", which I deleted in claws-mail prior to 
export - balsa was able to open the inbox without errors.

So it looks like at least one of 9 "mal-formed" mails stopped balsa from being able to read any of the mails, 
whereas claws-mail had no problems at all.