Bug#1050075: gtk4: 4.12 regression: FTBFS on arm*|ppc64el|s390x: several checkerboard tests failing

[Simon McVittie]

Source: gtk4
Version: 4.12.0+ds-1
Severity: serious
Tags: ftbfs
Justification: fails to build from source (but built successfully in the past)

gtk4 4.12.0 in experimental has test failures on multiple buildds.
Of those, arm64, armel, armhf, ppc64el and s390x all seem to have the same
failure mode:

  36/1464 gtk:gsk+gsk-compare+gsk-gl+gsk-compare-gl+wayland_gles_failing / gl big-checkerboard-scaled-down2                                              FAIL            3.48s   exit status 1
  37/1464 gtk:gsk+gsk-compare+gsk-gl+gsk-compare-gl+wayland_gles_failing+gsk-compare-flipped-gl / gl big-checkerboard-scaled-down2 flipped               FAIL            3.50s   exit status 1
  38/1464 gtk:gsk+gsk-compare+gsk-gl+gsk-compare-gl+wayland_gles_failing+gsk-compare-repeated-gl / gl big-checkerboard-scaled-down2 repeated             FAIL            3.78s   exit status 1
  39/1464 gtk:gsk+gsk-compare+gsk-gl+gsk-compare-gl+wayland_gles_failing+gsk-compare-rotated-gl / gl big-checkerboard-scaled-down2 rotated               FAIL            3.62s   exit status 1
  42/1464 gtk:gsk+gsk-compare+gsk-gl+gsk-compare-gl+wayland_gles_failing+gsk-compare-masked-gl / gl big-checkerboard-scaled-down2 masked                 FAIL            4.00s   exit status 1

I'm unsure why we are running tests that appear to be flagged as "failing".
Perhaps it just needs some --no-suite=failing added?

Test failures on i386 and mips64el are out of scope for this bug report.

    smcv