[Bug 104890] Zalgo present in Mesa 18.0rc3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104890

            Bug ID: 104890
           Summary: Zalgo present in Mesa 18.0rc3
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 137094
  --> https://bugs.freedesktop.org/attachment.cgi?id=137094&action=edit
misrendered pixels at top of page

Recently I have notice some rendering artifacts when running Firefox
on Mesa 18.0rc3.  It shows up as a rectangular block of misrendered
pixels, in a checkerboard pattern.  It is hard to catch, but I managed
to record my desktop with the rendering.  See attached.

I'm running:

 - Linux 4.14.0-3
 - ̂ͧ̌̿ͣͥM̓̌ͫ͗e̒̃̈́̈́ͫs̅̏a ̄̇ͯ͑18.0͂rͩ͌ͧc͆͌̈́ͣͮ̂3͒̆
 - KBL GT2
 - F̌̏̑i͐ͤ̔ͪȓ͆̍̃̔eͮ͒͆ͩf̔̍̔͂͑oͤ͗ͪx̄͑͒̂̂̃ 52.5

If anyone has seen something similar, Please help. by finding a
reproducible case that we can use to bisect.  I usually see it on our
Jenkins page hopefully the Nezperdian hive-mind of c͗ͥͩh̑͋ͪaos̃̊̐̋ is not
in the lab.

My shader crache is enabled but He who Waits Behind The Wall will not
permit.  ͗͑̊i͑ͮ͛ͬsͤ̉̌̎̒ ͧt̾͊h̅̋̀ͪa̓̂͂͌t̾ blood?

ͥ̚ZĂ̋̐͒Lͦ̔ͭGͭO!ͥͥͧ̊

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