https://bugs.freedesktop.org/show_bug.cgi?id=83555

Terrence Enger <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[email protected]
           Keywords|                            |bisected

--- Comment #6 from Terrence Enger <[email protected]> ---
Following the instructions provided, I have made a segfault with
PC=0x0; frame 1 of the backtrace is in function
GraphicObject::ImplAutoSwapOutHdl(void*).  

I notice in at least one version, if I start by typing <End> to
display Slide 4, there is no crash, not even when I type <Home> and
then successive <Page Down> to leave and return to Slide 4.  Maybe
this says something about how the segfault happens.


The crash appears to have been introduced and removed from master
within the range covered by the daily dbgutil bibisect repo.
Specifically, it first appears in 369f344... 2014-08-10 and it is
first gone in 8c0ffaa... 2014-09-01.

So, this bug report is obviously headed for FESOLVED WORKSFORME.  But
I wonder if there may be implications for other branches.  I shall
leave it for somebody with better git-foo than mine to resolve the
report.


For completeness, as I worked from the oldest version in the repo to
find the introduction of the crash, I see `git bisect bad` says:

    369f34427476c645cac930bdf29234638a1b41ae is the first bad commit
    commit 369f34427476c645cac930bdf29234638a1b41ae
    Author: Miklos Vajna <[email protected]>
    Date:   Sun Aug 10 11:05:46 2014 +0000

        2014-08-10

    :100644 100644 8c5b1d442bd7d00aa095491efff03c497abf0714
60ecce52baca1650da7c57df652a27469fdb75d5 M    build-info.txt
    :040000 040000 e6b8fb5a60898792ecfb8245b51e0abe14f768de
13fc7876272e8fbcbe2683b53338aeb72061869e M    opt

and `git bisect log`:

    # bad: [8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d] 2014-09-01
    # good: [b3130c846de5cf1b4be48b48dfc780bb369549fa] 2014-05-21
    git bisect start '8c0ffaa' 'oldest'
    # good: [eb37477c7906b4c4b7eb11433c7566f669a040d1] 2014-07-11
    git bisect good eb37477c7906b4c4b7eb11433c7566f669a040d1
    # good: [3b906f385ccc5e3bda8892bf4ff72744876172af] 2014-08-06
    git bisect good 3b906f385ccc5e3bda8892bf4ff72744876172af
    # bad: [e0f6f58d1ff3c05c404dbdc21dbe1ccbc94d4276] 2014-08-19
    git bisect bad e0f6f58d1ff3c05c404dbdc21dbe1ccbc94d4276
    # bad: [59a8d89d4255a1cbcab4fcfeff9270dd56c62aed] 2014-08-12
    git bisect bad 59a8d89d4255a1cbcab4fcfeff9270dd56c62aed
    # good: [ccf7a47fb02d2909d2ad6d03d6218d3cf07b3b2a] 2014-08-09
    git bisect good ccf7a47fb02d2909d2ad6d03d6218d3cf07b3b2a
    # bad: [6b0c7213477d9c4ebf74bdf74871a684f1a9b6dd] 2014-08-11
    git bisect bad 6b0c7213477d9c4ebf74bdf74871a684f1a9b6dd
    # bad: [369f34427476c645cac930bdf29234638a1b41ae] 2014-08-10
    git bisect bad 369f34427476c645cac930bdf29234638a1b41ae

and working from the version of 2014-08-29 to find the disappearance
of the crash, I see `git bisect bad`:

    8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d is the first bad commit
    commit 8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d
    Author: Miklos Vajna <[email protected]>
    Date:   Mon Sep 1 09:48:23 2014 +0000

        2014-09-01

    :100644 100644 de56afe3d5f5e122723947b24311bd00acad1f70
60248ccd1189423ee8b6cafc100cfe547e335431 M    build-info.txt
    :040000 040000 f22263c2481b8cdc146b58a23b60c9ec2d6f56f0
7e57ec88799dc9cff16206c4351dec8337982f7a M    opt

and `git bisect log:

    # bad: [827afd643c75bdea4680bfee7b131286c0bdedba] 2014-09-06
    # good: [a8232b4c392ff3508dc1a7b6ab5dd9a6d2bfdd99] 2014-08-29
    git bisect start 'origin/master' 'a8232b4c'
    # bad: [75759d2694646b0451a091448da51bf098722c35] 2014-09-02
    git bisect bad 75759d2694646b0451a091448da51bf098722c35
    # good: [db4bc4671fbec1a556703a0fb0046aed7bb45d90] 2014-08-31
    git bisect good db4bc4671fbec1a556703a0fb0046aed7bb45d90
    # bad: [8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d] 2014-09-01
    git bisect bad 8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d
    # first bad commit: [8c0ffaa3f2ace1b3a8e8e1db44b11ba083637e4d] 2014-09-01

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