Bug#1120601: gdk-pixbuf: autopkgtests fail after switching to glycin

[Jeremy Bícha]

Source: gdk-pixbuf
Version: 2.44.4+dfsg-2
Severity: serious
Tags: experimental
Control: block 1116981 by -1
X-Debbugs-CC: alessandro.astone at canonical.com

The autopkgtests fail after switching gdk-pixbuf to use glycin.
Although using glycin is the upstream default, I believe that
upstream's CI doesn't run installed tests.

My initial guess is that maybe the test files are sensitive to what
software is used to generate the images, but I haven't investigated.
If this is true, I suggest that the test files should be updated to
match gdk-pixbuf's defaults even if they fail when not built with
glycin. This does concern me since glycin and rust-image are still
under heavy development so maybe these tests would break again for
future releases.

Thanks,
Jeremy Bícha