mutt/2176: mutt segfaults when tab-expanding '=' to disconnected IMAPs box

[holecek@xxxxxxxxxx]

>Number:         2176
>Notify-List:    holecek@xxxxxxxxxx
>Category:       mutt
>Synopsis:       mutt segfaults when tab-expanding '=' to disconnected IMAPs box
>Confidential:   no
>Severity:       minor
>Priority:       medium
>Responsible:    mutt-dev
>State:          open
>Keywords:       
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 01 23:17:57 +0100 2006
>Originator:     Honza Holecek
>Release:        1.5.11
>Organization:
>Environment:
Intel Mobile Pentium 4, Gentoo Linux
Mutt 1.5.11 (2005-09-15)
System: Linux 2.6.14-gentoo-r4 (i686) [using ncurses 5.4] [using libidn 0.5.15 
(compiled with 0.5.15)]
Přelo?eno s volbami:
-DOMAIN
-DEBUG
-HOMESPOOL  +USE_SETGID  +USE_DOTLOCK  +DL_STANDALONE
-USE_FCNTL  +USE_FLOCK   -USE_INODESORT
-USE_POP  +USE_IMAP  -USE_GSS  +USE_SSL  -USE_GNUTLS  -USE_SASL
-HAVE_REGCOMP  +USE_GNU_REGEX  +COMPRESSED
+HAVE_COLOR  +HAVE_START_COLOR  +HAVE_TYPEAHEAD  +HAVE_BKGDSET
+HAVE_CURS_SET  +HAVE_META  +HAVE_RESIZETERM
+CRYPT_BACKEND_CLASSIC_PGP  -CRYPT_BACKEND_CLASSIC_SMIME  -CRYPT_BACKEND_GPGME  
-BUFFY_SIZE -EXACT_ADDRESS  -SUN_ATTACHMENT
+ENABLE_NLS  -LOCALES_HACK  +HAVE_WC_FUNCS  +HAVE_LANGINFO_CODESET  
+HAVE_LANGINFO_YESEXPR
+HAVE_ICONV  -ICONV_NONTRANS  +HAVE_LIBIDN  +HAVE_GETSID  +HAVE_GETADDRINFO  
+USE_HCACHE
-ISPELL
SENDMAIL="/usr/sbin/sendmail"
MAILPATH="/var/spool/mail"
PKGDATADIR="/usr/share/mutt"
SYSCONFDIR="/etc/mutt"
EXECSHELL="/bin/sh"
MIXMASTER="mixmaster"

patch-1.5.6.dw.pgp-timeout.1
patch-1.5.6.dw.mbox-hook.1
rr.compressed
patch-1.5.4.lpr.collapse_flagged Lukas P. Ruf <lukas.ruf@xxxxxx>
patch-1.5.10.tt.assumed_charset.1
>Description:
Mutt segfaults during folder name completion under certain conditions: typed 
string should expand to a list of IMAPs folders but the IMAPs connection is not 
established yet.
>How-To-Repeat:
I have in my .muttrc these lines:
set mbox_type   = mbox
set folder      = imaps://host.name//path/to/maildir"
set spoolfile   = "/var/mail/user"
set mbox        = "/var/mail/user"

I start mutt. It opens /var/mail/user (usually empty). I type 'm' to change 
mailbox. I type '=' to access an IMAPs folder. I press tabulator to get list of 
my IMAPs folders. Mutt segfaults as IMAPs connection is not established yet (I 
guess).

Alternatively, you can type just 'imaps://' and then the <TAB> key to start 
completion. The mutt will segfault too.
>Fix:
I have tracked the segfault down to case-block
line 443: case OP_EDITOR_COMPLETE:
in function _mutt_enter_string in file enter.c.

I got lost there, sorry.
>Add-To-Audit-Trail:

>Unformatted: