attribute-invalid : <release> timestamp is in the future

[Paul Broadhead]

$ lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

$ apt-cache policy libappstream-glib8
libappstream-glib8:
  Installed: 0.7.16-1ubuntu1
  Candidate: 0.7.16-1ubuntu1
  Version table:
 *** 0.7.16-1ubuntu1 500
        500 http://gb.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

I'm UK based with time set to BST. If I set the <release> date to the current date, then between 12:00 midnight and 1:00am, flatpak-builder fails with and error:

org.pjbroad.EternallandsClient: AppData problem: attribute-invalid : <release> timestamp is in the future
Error loading AppData file: AppData file /app/share/appdata/org.pjbroad.EternallandsClient.appdata.xml was not valid
Error: ERROR: appstream-compose failed: Child process exited with code 1

I would expect using my local date to be valid.

This bug is fixed upstream in version 0.7.17
https://github.com/hughsie/appstream-glib/commit/72789b6ff59f5d1741d1cbc29e90bfa57079c514

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: libappstream-glib8 0.7.16-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Wed Apr 15 00:31:43 2020
InstallationDate: Installed on 2019-11-02 (164 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: appstream-glib
UpgradeStatus: Upgraded to focal on 2020-03-28 (17 days ago)