Package: mutt
Version: 1.5.16-3
Severity: normal
>From time to time, mutt will crash with a SIGSEGV when doing an IMAP
mailbox check. I build an unstripped version of the package with
debugging symbols enabled to get better data.
Here's the backtrace:
(gdb) where
#0 mx_update_context (ctx=0x770130, new_messages=1) at ../mx.c:1669
#1 0x000000000048dd3d in imap_read_headers (idata=0x76fad0, msgbegin=35182,
msgend=35182) at ../../imap/message.c:346
#2 0x0000000000486423 in imap_cmd_finish (idata=0x76fad0) at
../../imap/command.c:308
#3 0x00000000004868fb in imap_cmd_step (idata=0x76fad0) at
../../imap/command.c:213
#4 0x000000000048796a in imap_exec (idata=0x76fad0, cmdstr=<value optimized
out>, flags=0) at ../../imap/command.c:262
#5 0x000000000048849f in imap_check_mailbox (ctx=<value optimized out>,
index_hint=<value optimized out>, force=0) at ../../imap/imap.c:1385
#6 0x000000000041c12d in mutt_index_menu () at ../curs_main.c:498
#7 0x000000000043736a in main (argc=1, argv=0x7fff562fb778) at ../main.c:995
The bit of code is here (line 1669):
1664 h = ctx->hdrs[msgno];
1665
1666 if (WithCrypto)
1667 {
1668 /* NOTE: this _must_ be done before the check for mailcap! */
1669 h->security = crypt_query (h->content);
1670 }
1671
1672 if (!ctx->pattern)
1673 {
h in this case is NULL (hence the SIGSEGV), as is ctx->hdrs[msgno].
msgno in this specific crash is 35182. ctx->msgcount is 35183. So this
is the last message.
ctx->hdrs[msgno-1] points to something real. This may end up being a
fencepost bug to me but I don't know enough about the mutt internals to
say where it is just yet.
I can't reproduce this at will but it occurs with some frequency (once
every couple of days or so with the mailbox I'm using). Mutt is talking
to dbmail (2.2.5-1) on the backend.
I've saved the core file just in case you need me to go back and look at
this.
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1,
'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.20-1-amd64 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages mutt depends on:
ii libc6 2.6-2 GNU C Library: Shared libraries
ii libgdbm3 1.8.3-3 GNU dbm database routines (runtime
ii libgnutls13 1.6.3-1 the GNU TLS library - runtime libr
ii libidn11 0.6.5-1 GNU libidn library, implementation
ii libncursesw5 5.6+20070716-1 Shared libraries for terminal hand
ii libsasl2-2 2.1.22.dfsg1-13 Authentication abstraction library
Versions of packages mutt recommends:
ii locales 2.6-2 GNU C Library: National Language (
ii mime-support 3.39-1 MIME files 'mime.types' & 'mailcap
ii postfix [mail-transport-agent 2.4.3-1 High-performance mail transport ag
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