gnome software continuously takes more memory

[fcole90]

After opening gnome software, it starts taking more and more memory in big chunks, around 80MB per second. While I'm writing this report it has already taken 3.1GB of memory. As time passes it also asks more CPU, taking sometimes up to 33% on my machine.

Reproduce:
- kill any instance of gnome software
- open gnome software
- watch it eat all your memory

This doesn't happen every time. When it happened to me I had just killed gnome software because it was taking a lot of CPU.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-software 3.25.91-1ubuntu5
ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8
Uname: Linux 4.12.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Sep 10 09:45:29 2017
InstallationDate: Installed on 2017-08-21 (19 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170820)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-limba N/A
 gnome-software-plugin-snap 3.25.91-1ubuntu5
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please try to obtain a valgrind log following the instructions at https://wiki.ubuntu.com/Valgrind and attach the file to the bug report. This will greatly help us in tracking down your problem.

[Launchpad Janitor (janitor)]

[Expired for gnome-software (Ubuntu) because there has been no activity for 60 days.]