Created attachment 1215214 [details]
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File: cgroup

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File: core_backtrace

Created attachment 1215217 [details]
File: dso_list

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File: environ

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File: limits

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File: maps

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File: mountinfo

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File: namespaces

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File: var_log_messages

I had this again today with xorg-x11-server-Xorg-1.19.0-0.7.rc2.fc25 and in parallel with https://bugzilla.redhat.com/show_bug.cgi?id=1384508

Similar problem has been detected:

My Xserver crashes reliable after running small Java sample which should display Input box:

import javax.swing.JFrame;
import javax.swing.JOptionPane;
[..]
        JFrame frame = new JFrame();
        String s = JOptionPane.showInputDialog(frame, text);

reporter:       libreport-2.8.0
backtrace_rating: 4
cmdline:        /usr/libexec/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -nolisten tcp -background none -noreset -keeptty -verbose 3
crash_function: RegionUninit
executable:     /usr/libexec/Xorg
global_pid:     2030
kernel:         4.8.11-300.fc25.x86_64
package:        xorg-x11-server-Xorg-1.19.0-1.fc25
pkg_fingerprint: 4089 D8F2 FDB1 9C98
pkg_vendor:     Fedora Project
reason:         Xorg killed by SIGABRT
runlevel:       N 5
type:           CCpp
uid:            1000

Well, chances are this is the same issue, would you mind attaching your reproducer either in this bug or in bug 1402599 ?

Pretty sure I know what this is. Can you try this scratch X server build?

https://koji.fedoraproject.org/koji/taskinfo?taskID=16856474

(In reply to Adam Jackson from comment #16)
> Pretty sure I know what this is. Can you try this scratch X server build?
> 
> https://koji.fedoraproject.org/koji/taskinfo?taskID=16856474

hi adam. yes, this addresses the issue I was having with a java app crashing Xorg.  thanks so much!

Thanks, seems that it has probably fixed the problem (it was a little unpredictable in my case).

I see some non-fatal hangups with DOSBox since installing, but I am not sure if this is related.

(In reply to rickyb.com from comment #17)
> (In reply to Adam Jackson from comment #16)
> > Pretty sure I know what this is. Can you try this scratch X server build?
> > 
> > https://koji.fedoraproject.org/koji/taskinfo?taskID=16856474
> 
> hi adam. yes, this addresses the issue I was having with a java app crashing
> Xorg.  thanks so much!

Great, thanks for the feedback. I'm preparing a F25+ xserver update with some other fixes, I will also add in the fix for this.

xorg-x11-server-1.19.0-2.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2016-7f2899e78e

Created attachment 1232287 [details]
sample java inputdialog

Here is sample Java file to reproduce this bug.
Run by 
$ javac Crash.java
$ java Crash

I use java-1.8.0-openjdk-1.8.0.111-4.b16.fc25.x86_64

xorg-x11-server-1.19.0-2.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-7f2899e78e

After installing xorg-x11-server-Xorg-1.19.0-2.fc25.x86_64.rpm and  xorg-x11-server-common-1.19.0-2.fc25.x86_64.rpm from koji, my sample works fine.

Thank you for addressing this issue so quickly!

xorg-x11-server-1.19.0-2.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

*** Bug 1402599 has been marked as a duplicate of this bug. ***