xfce4-settings-manager crashed with SIGSEGV in gtk_drag_finish()

Bug #1785143 reported by Spass on 2018-08-02
This bug affects 1 person
Affects Status Importance Assigned to Milestone
xfce4-settings (Ubuntu)

Bug Description

I was changing some options in the Window Manager settings (xfwm4 4.13.1). It started behaving strangely - when I clicked somewhere in the Window Manager settings window it brought me back to the main settings window, I clicked on Window Manager icon, WM settings window showed up and the crash report opened.

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: xfce4-settings 4.13.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic x86_64
ApportVersion: 2.20.10-0ubuntu7
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Aug 3 00:59:43 2018
ExecutablePath: /usr/bin/xfce4-settings-manager
InstallationDate: Installed on 2018-08-01 (1 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180801)
ProcCmdline: xfce4-settings-manager
 Segfault happened at: 0x7f088d2db1ed <gtk_drag_finish+29>: mov (%rbx),%rdx
 PC (0x7f088d2db1ed) ok
 source "(%rbx)" (0x00000008) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: xfce4-settings
 gtk_drag_finish () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: xfce4-settings-manager crashed with SIGSEGV in gtk_drag_finish()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

Spass (malysps) wrote :
information type: Private → Public

 gtk_drag_finish (context=0x8, success=0, del=0, time=6) at ../../../../gtk/gtkdnd.c:961
 gtk_drag_drop_finished (info=0x560a3ecfbd60, result=result@entry=GTK_DRAG_RESULT_TIMEOUT_EXPIRED, time=<optimized out>) at ../../../../gtk/gtkdnd.c:2593
 gtk_drag_abort_timeout (data=<optimized out>) at ../../../../gtk/gtkdnd.c:3265
 gdk_threads_dispatch (data=0x560a3ea53f20, data@entry=<error reading variable: value has been optimized out>) at ../../../../gdk/gdk.c:755
 g_timeout_dispatch (source=source@entry=0x560a3ecdeac0, callback=<optimized out>, user_data=<optimized out>) at ../../../../glib/gmain.c:4650

Changed in xfce4-settings (Ubuntu):
importance: Undecided → Medium
tags: removed: need-amd64-retrace
In , Spass (malysps) wrote :

Created attachment 7885
terminal output

Hello, I'm testing Xubuntu 18.10 with xfwm4 4.13.1 installed in VirtualBox VM. I have an issue with xfwm4-settings (opened separately and within the xfce4-settings-manager) window crashing when I change the button layout, just by dragging it's elements.

There are some issues with "gtk_widget_size_allocate" and most important:
xfwm4-settings: ../../../../src/cairo-surface.c:1734: cairo_surface_mark_dirty_rectangle: Assertion `! _cairo_surface_has_mime_data (surface)' failed.
(full terminal output attached)

Besides the window closing/crashing, when I open Window Manager settings from Settings Manager (and only then) and when I change the button layout, the buttons are disappearing from that section (see here - https://ibb.co/mXtPBU ). Probably related to "gtk_widget_size_allocate".

In , Spass (malysps) wrote :

Also, this is my Launchpad bug report related to this issue, maybe it will be useful:

Changed in xfwm4:
importance: Unknown → Medium
status: Unknown → Confirmed
Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:

tags: added: iso-testing
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