[Bug 90299] New: Xorg crashes when running xscreensaver-demo (during preview of certain screensavers)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90299

            Bug ID: 90299
           Summary: Xorg crashes when running xscreensaver-demo (during
                    preview of certain screensavers)
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: forgge at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 115530
  --> https://bugs.freedesktop.org/attachment.cgi?id=115530&action=edit
Actual log of a crash

Overview:
 Bug occur if to try to preview some of screensavers provided by xscreensaver
(by simply clicking to it). I can't really understand where the difference
between 'failing' and 'normal' savers. But they are the same every time. Two
that produces crash is 'Halo' and 
'Polyominoes'.

Steps to reproduce:
1. Open xscreensaver-demo
2. Click to 'Halo' or 'Polyominoes' screensaver.
3. Observe a result

Actual Results:
Xorg crashes. Log is following:

[ 51564.136] (EE) 
[ 51564.136] (EE) Backtrace:
[ 51564.137] (EE) 0: /usr/lib/xorg-server/Xorg (OsLookupColor+0x119) [0x594a29]
[ 51564.137] (EE) 1: /usr/lib/libc.so.6 (__restore_rt+0x0) [0x7fbe78f1b53f]
[ 51564.138] (EE) 2: /usr/lib/xorg/modules/libfb.so (fbBltOne+0x508)
[0x7fbe6df62968]
[ 51564.138] (EE) 3: /usr/lib/xorg/modules/libfb.so (fbPutXYImage+0x23f)
[0x7fbe6df6683f]
[ 51564.138] (EE) 4: /usr/lib/xorg/modules/libfb.so (fbPutImage+0xf2)
[0x7fbe6df66b52]
[ 51564.139] (EE) 5: /usr/lib/xorg/modules/libglamoregl.so
(glamor_glyphs_nf+0x6fd) [0x7fbe7370a35d]
[ 51564.139] (EE) 6: /usr/lib/xorg-server/Xorg (DamageRegionAppend+0x34c3)
[0x51f863]
[ 51564.139] (EE) 7: /usr/lib/xorg-server/Xorg (SendGraphicsExpose+0xead)
[0x43636d]
[ 51564.139] (EE) 8: /usr/lib/xorg-server/Xorg (SendErrorToClient+0x2f7)
[0x438a97]
[ 51564.139] (EE) 9: /usr/lib/xorg-server/Xorg (remove_fs_handlers+0x41b)
[0x43cbcb]
[ 51564.140] (EE) 10: /usr/lib/libc.so.6 (__libc_start_main+0xf0)
[0x7fbe78f08800]
[ 51564.140] (EE) 11: /usr/lib/xorg-server/Xorg (_start+0x29) [0x427039]
[ 51564.141] (EE) 12: ? (?+0x29) [0x29]
[ 51564.141] (EE) 
[ 51564.141] (EE) Segmentation fault at address 0x1ab55c
[ 51564.141] (EE) 
Fatal server error:
[ 51564.141] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 51564.141] (EE) 
[ 51564.141] (EE) 
Please consult the The X.Org Foundation support 
     at http://wiki.x.org
 for help. 
[ 51564.141] (EE) Please also check the log file at "/var/log/Xorg.0.log" for
additional information.
[ 51564.141] (EE) 
[ 51564.141] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 51564.182] (EE) Server terminated with error (1). Closing log file.

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