gthumb fails to start with empty thumbnail images

[chrysn]

when opening an image in a directory one of whose files has a broken thumbnail in ~/.thumbnails/normal/, gthumb crashes.

attached is the crash output of gthumb run with strace -eopen to get a rough impression what fails. the last file accessed is a 0 byte png, which was probably created when the system ran out of disk space or a program crash.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: gthumb 3:2.13.1-1
ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
Uname: Linux 2.6.38-12-generic x86_64
Architecture: amd64
Date: Fri Nov 11 19:36:15 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=de:en
 LANG=de_AT.UTF-8
 LC_MESSAGES=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gthumb
UpgradeStatus: No upgrade log present (probably fresh install)