[Bug 92447] New: kgem_bo_pair_undo:2847 assertion 'b->exec == &kgem->exec[0] || b->exec == &kgem->exec[1]' failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92447

            Bug ID: 92447
           Summary: kgem_bo_pair_undo:2847 assertion 'b->exec ==
                    &kgem->exec[0] || b->exec == &kgem->exec[1]' failed
           Product: xorg
           Version: git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: valko at linux.karinthy.hu
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 118851
  --> https://bugs.freedesktop.org/attachment.cgi?id=118851&action=edit
Xorg.0.log

After about 10-15 minutes of uptime, the latest Intel driver crashes with
assertion failure message:
kgem_bo_pair_undo:2847 assertion 'b->exec == &kgem->exec[0] || b->exec ==
&kgem->exec[1]' failed

System: Gentoo
Components used:
- xf86-video-intel 2.99.917 (latest from git 2015-10-09
df72bc57610bb2f58eec9801820ea11628b244eb)
- xorg-server 1.16.4 (with patch
https://bugs.freedesktop.org/attachment.cgi?id=94929)

Running applications:
Firefox 38.3.0, Opera 12.16, xterms

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