And I'm also copying the relevant parts of the description of bug #1712991, which is private (not sure why but it's not up to me to decide whether it should be made public):
That plus the comment about deleting the cache makes me think that an abrupt shutdown (e.g. a power outage) can result in a corrupted cache, which simple-scan isn't able to gracefully handle.
And I'm also copying the relevant parts of the description of bug #1712991, which is private (not sure why but it's not up to me to decide whether it should be made public):
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1. Laptop switched of (no power) after scanning document
2. After restart can not start star simple-scan
simple-scan
(simple-scan:3519): Gtk-WARNING **: Failed to register client: GDBus.Error: org.gnome. SessionManager. AlreadyRegister ed: Unable to register client
Segmentation fault (core dumped)
ProblemType: Crash ature: Ubuntu 4.12.0- 12.13-generic 4.12.8 simple- scan
DistroRelease: Ubuntu 17.10
Package: simple-scan 3.25.90-0ubuntu1
ProcVersionSign
Uname: Linux 4.12.0-12-generic x86_64
ApportVersion: 2.20.6-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 25 09:41:56 2017
ExecutablePath: /usr/bin/
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That plus the comment about deleting the cache makes me think that an abrupt shutdown (e.g. a power outage) can result in a corrupted cache, which simple-scan isn't able to gracefully handle.