crash unexpectedly while folder was loading, no warning

[pleabargain]

While opening a folder with 100+ images gthumb crashed unexpectedly.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gthumb 3:3.11.2-0.1build2
ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 10 07:53:22 2021
InstallationDate: Installed on 2015-08-23 (2178 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: gthumb
UpgradeStatus: Upgraded to hirsute on 2021-07-26 (14 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2021-01-13T09:36:03.851337