[cairo-bugs] [Bug 96933] New: record* tests with xcb target failing even with CAIRO_REF_DIR generated from the same commit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96933

            Bug ID: 96933
           Summary: record* tests with xcb target failing even with
                    CAIRO_REF_DIR generated from the same commit
           Product: cairo
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: xcb backend
          Assignee: psychon at znc.in
          Reporter: darxus at chaosreigns.com
        QA Contact: cairo-bugs at cairographics.org

Created attachment 125076
  --> https://bugs.freedesktop.org/attachment.cgi?id=125076&action=edit
Script used to run the test three times on the latest commit

commit b73c082c7f412f53eb2e4b52689601128a5f06a0
(Latest commit.)

$ grep ': FAIL' test-suite.log 
record-paint-alpha-clip-mask: FAIL (xcb, xcb-window, xcb-window&)
record1414x-paint-alpha-clip-mask: FAIL (xcb, xcb-window, xcb-window&)
record2x-paint-alpha-clip-mask: FAIL (xcb, xcb-window, xcb-window&)
recordflip-paint-alpha-clip-mask: FAIL (xcb, xcb-window&)

Run with:
Xvfb -screen 0 1680x1024x24 -ac -nolisten tcp :5 &

I ran it once, copied output to a reference directory, then ran it two more
times, against that reference directory:
DISPLAY=:5 CAIRO_REF_DIR=$HOME/source/cairo-ref.xcb.xvfb.1
CAIRO_TEST_TARGET=xcb make test

Both times, these four tests failed.


I repeated this on random commits (generating a reference set from the commit,
then running the tests against that reference), and for the 22 commits that
included these tests, it looks like these tests are failing as far back as they
exist (March 2012).

Results for these four tests are similar with the xlib target.

All tests pass for the image target when run similarly (with a new reference),
except with an 8 bit Xvfb (two crash with a 24 bit Xvfb).

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