4.13.6 tests hitting '1796 (out of 75600) pixels differ from reference by up to 10 levels' errors
Trying to update the Debian package to 4.13.6 we are seeing a number of those tests errors
Build log from an Ubuntu ppa https://launchpadlibrarian.net/711829845/buildlog_ubuntu-noble-amd64.gtk4_4.13.6+ds-0builtest1_BUILDING.txt.gz
Picking on example
$ debian/build/deb/testsuite/gsk/compare-render --output debian/build/deb/testsuite/gsk/compare/gl testsuite/gsk/compare/big-box-glyph-nocairo.node testsuite/gsk/compare/big-box-glyph-nocairo.png
TAP version 13
# random seed: R02S5d352b5bda8fd590cf956fbfd9326d94
# GLib-GIO-DEBUG: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3)
# Node file: 'testsuite/gsk/compare/big-box-glyph-nocairo.node'
# PNG file: 'testsuite/gsk/compare/big-box-glyph-nocairo.png'
# GLib-GIO-DEBUG: _g_io_module_get_default: Found default implementation gvfs (GDaemonVfs) for ?gio-vfs?
# Storing test result image at /tmp/gtk/gtk4-4.13.6+ds/debian/build/deb/testsuite/gsk/compare/gl/big-box-glyph-nocairo.out.png
# 1796 (out of 75600) pixels differ from reference by up to 10 levels
# Storing test result image at /tmp/gtk/gtk4-4.13.6+ds/debian/build/deb/testsuite/gsk/compare/gl/big-box-glyph-nocairo.diff.png
the generated images