Arch Linux

Description:
From 723a27e280cbe3f4d7975b7f35217b5600bfbe00 Mon Sep 17 00:00:00 2001
From: Sebastian Keller <sebastian-keller@gmx.de>
Date: Sun, 10 Jan 2016 04:15:09 +0100
Subject: [PATCH] xprops: Null-terminate property reply values

Some of the mutter code using these properties expects them to be
null-terminated whereas xcb does not use null-terminated strings:

http://xcb.freedesktop.org/XcbRationale/

This was in some cases resulting in the WM_CLASS property containing
garbage data which broke application matching, caused the hot-corner and
window-switcher to stop working, or was exposed as text in the UI.

https://bugzilla.gnome.org/show_bug.cgi?id=759658

Additional info:
* mutter-3.18.2-1
Jan 31 10:20:13 eanna gnome-session[1871]: (gnome-shell:11444): Gjs-WARNING **: JS ERROR: TypeError: this._switcherList is null
Jan 31 10:20:13 eanna gnome-session[1871]: SwitcherPopup<._allocate@resource:///org/gnome/shell/ui/switcherPopup.js:94
Jan 31 10:20:13 eanna gnome-session[1871]: wrapper@resource:///org/gnome/gjs/modules/lang.js:178
Jan 31 10:20:13 eanna gnome-session[1871]: _parent@resource:///org/gnome/gjs/modules/lang.js:131
Jan 31 10:20:13 eanna gnome-session[1871]: AppSwitcherPopup<._allocate@resource:///org/gnome/shell/ui/altTab.js:72
Jan 31 10:20:13 eanna gnome-session[1871]: wrapper@resource:///org/gnome/gjs/modules/lang.js:178
Jan 31 10:20:13 eanna gnome-session[1871]: LayoutManager<._init/<@resource:///org/gnome/shell/ui/layout.js:204

Steps to reproduce:
1. Install mutter-3.18.2-1
2. Launch an application that has non-null-terminated strings as part of it's xcb output.
The application suggested by a duplicate upstream () is tn5250j-0.7.6-1.
For me it could any one of (not sure which, but I am definitely running into this bug repeatedly):
2a. intelli-idea-ultimate-edition-15.0.3-1
2b. oracle-sqldeveloper-4.1.2.20.64-1
2c. datagrip-1.0.2-1
3. Over time, eventually lose window switcher and hot-corner.