pantheon-files crashed with SIGSEGV in gof_file_is_folder() and it even deleted my Downloads directory without any hints

[jazzi]

When I rename a file, Panthenon-files crashed.

And I found my ~/Downloads directory is gone earier today, no crash no error message, it's just gone.

ProblemType: Crash
DistroRelease: elementary OS 0.2
Package: pantheon-files 0.1-0~r1053+pkg10~precise1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.2.0-33.52-generic-pae 3.2.31
Uname: Linux 3.2.0-33-generic-pae i686
ApportVersion: 2.0.1-0ubuntu15+elementary3~precise1
Architecture: i386
CrashCounter: 1
CrashDB: pantheon_files
Date: Mon Dec 17 20:22:04 2012
ExecutablePath: /usr/bin/pantheon-files
InstallationMedia: elementary OS 0.2 "Luna" - Beta 1 i386 (20121114)
MarkForUpload: True
ProcCmdline: pantheon-files
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb76c780f <gof_file_is_folder+31>: mov 0x48(%esi),%edx
 PC (0xb76c780f) ok
 source "0x48(%esi)" (0x00000048) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: pantheon-files
StacktraceTop:
 gof_file_is_folder () from /usr/lib/libmarlincore.so.0
 ?? ()
 fm_directory_view_notify_selection_changed ()
 g_cclosure_marshal_VOID__VOIDv () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: pantheon-files crashed with SIGSEGV in gof_file_is_folder()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[RabbitBot (rabbitbot-a)]

StacktraceTop:
 gof_file_is_folder (file=0x0) at /build/buildd/pantheon-files-0.1/libcore/gof-file.c:2302
 update_menus_selection (view=0x9056190) at /build/buildd/pantheon-files-0.1/src/fm-directory-view.c:1901
 update_menus (view=0x9056190) at /build/buildd/pantheon-files-0.1/src/fm-directory-view.c:2962
 fm_directory_view_notify_selection_changed (view=0x9056190) at /build/buildd/pantheon-files-0.1/src/fm-directory-view.c:2998
 fm_directory_view_notify_selection_changed (view=0x9056190) at /build/buildd/pantheon-files-0.1/src/fm-directory-view.c:2981