Apport hang opening bug on Gimp 2.8.22 installed in snap

[corrado venturini]

On Ubuntu 17.10 I installed gimp using Ubuntu Software. Gimp (2.8.22 according help-about) has been installed in snapd with many error messages (failed to read from snapd, failed to write to snapd...) but it works.

corrado@corrado-aa-0919-p9:~$ snap info gimp
name: gimp
summary: "GNU Image Manipulation Program"
publisher: snapcrafters
contact: https://github.com/snapcrafters/gimp/issues
description: |
  Whether you are a graphic designer, photographer, illustrator, or scientist,
  GIMP provides you with sophisticated tools to get your job done. You can
  further enhance your productivity with GIMP thanks to many customization
  options and 3rd party plugins.
snap-id: KDHYbyuzZukmLhiogKiUksByRhXD2gYV
commands:
  - gimp
tracking: stable
installed: 2.8.22 (25) 141MB -
refreshed: 2017-09-12 22:41:22 +0200 CEST
channels:
  stable: 2.8.22 (25) 141MB -
  candidate: 2.8.22 (25) 141MB -
  beta: 2.8.22 (25) 141MB -
  edge: 2.8.22 (25) 141MB -
corrado@corrado-aa-0919-p9:~$

gimp works fine on pictures existing on local drive, but is unable to access pictures residing on same harddisk different partition with a message 'Could not open... Permission denied. The same pictures are accessed smoothly by Image Viewer or Shotwell.
With the message 'Could not open...' on the screen I attempted to open a bug with ubuntu-bug -w or ubuntu-bug id# but apport seems hang collecting problem information with a message: The crashed program seems to use third-part or local libraries. see attached screenshot.
Gimp 2.8.20 installed via apt in Ubuntu 17.10 in a different partition of same disk does not have this problem.
Similar problem with VLC installed in snap: does nor work on videos residing in a different partition and apport hangs trying to create a bug report.

This bug report is obtained with 'ubuntu-bug gimp' but apport say 'not installed'

I don't know if I should open also a different bug for 'gimp unable to deal with pictures on different partitions' and 2 other bugs for VLC or a bug for snap.
Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gimp (not installed)
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Sep 23 14:53:34 2017
InstallationDate: Installed on 2017-09-21 (2 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170919)
SourcePackage: gimp
UpgradeStatus: No upgrade log present (probably fresh install)

[corrado venturini (corradoventu)]

now gimp is 'disappeared'

[corrado venturini (corradoventu)]

... but can be started from terminal

[corrado venturini (corradoventu)]

Old problem about Ubuntu 17.10. Changed status to invalid.