When any dialog (Open, save as, about Kate, about KDE, settings, hotkey settings etc.) is closed, Kate gets an X Window System error and quits without crash dialog.
EDIT: It only happens when workspaces are on.
EDIT2: It only happens if workspaces were enabled when Kate was launched.
How to reproduce: Ctrl+O; Esc.
This doesn't happen with KWrite.
This happens on Saucy with all the latest updates and Kate 4:4.10.3-0ubuntu1.
EDIT3: Happens on Raring too.
Terminal log:
~ $ kate
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
kate(19142)/kate-filetree KateFileTreePluginView::KateFileTreePluginView: BEGIN: mw: Kate::MainWindow(0x868cc40)
kate(19142)/kate-filetree ProxyItem::ProxyItem: ProxyItem(0x896a458,0x0,-1,QObject(0x0) ,"m_root")
kate(19142)/kate-filetree ProxyItem::ProxyItem: ProxyItem(0x8963f50,0x0,-1,QObject(0x0) ,"Bez tytułu")
kate(19142)/kate-filetree KateFileTreeModel::documentOpened: before add: ProxyItem(0x8963f50,0x0,-1,KateDocument(0x88023a8) , "Bez tytułu" )
kate(19142)/kate-filetree KateFileTreeModel::setupIcon: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::setupIcon: END!
kate(19142)/kate-filetree KateFileTreeModel::handleInsert: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::handleInsert: empty item
kate(19142)/kate-filetree ProxyItem::addChild: added ProxyItem(0x8963f50,0x896a458,0,KateDocument(0x88023a8) , "Bez tytułu" ) to ProxyItemDir(0x896a458,0x0,-1,"m_root", children:1)
kate(19142)/kate-filetree KateFileTreeModel::documentOpened: after add: ProxyItem(0x8963f50,0x896a458,0,KateDocument(0x88023a8) , "Bez tytułu" )
kate(19142)/kate-filetree KateFileTreeProxyModel::KateFileTreeProxyModel: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::updateBackgrounds: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::updateBackgrounds: m_editHistory contains 0 elements
kate(19142)/kate-filetree KateFileTreeModel::updateBackgrounds: END!
kate(19142)/kate-filetree KateFileTreePluginView::setListMode: BEGIN
kate(19142)/kate-filetree KateFileTreePluginView::setListMode: treeMode
kate(19142)/kate-filetree KateFileTreePluginView::setListMode: END
kate(19142)/kate-filetree KateFileTreePluginView::viewChanged: BEGIN!
kate(19142)/kate-filetree KateFileTreePluginView::viewChanged: BEGIN!
kate(19142)/kate-filetree KateFileTreeProxyModel::docIndex: !
kate(19142)/kate-filetree KateFileTreeModel::docIndex: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::docIndex: END!
kate(19142)/kate-filetree KateFileTreePluginView::viewChanged: selected doc= KateDocument(0x88023a8) QModelIndex(0,0,0x881c368,KateFileTreeProxyModel(0x8971190) )
kate(19142)/kate-filetree KateFileTreePluginView::viewChanged: display= "Bez tytułu"
kate(19142)/kate-filetree KateFileTreeModel::documentActivated: BEGIN!
kate(19142)/kate-filetree KateFileTreeModel::documentActivated: adding viewHistory ProxyItem(0x8963f50,0x896a458,0,KateDocument(0x88023a8) , "Bez tytułu" )
kate(19142)/kate-filetree KateFileTreeModel::documentActivated: END!
kate(19142)/kate-filetree KateFileTree::slotCurrentChanged: current: QModelIndex(0,0,0x881c368,KateFileTreeProxyModel(0x8971190) ) previous: QModelIndex(-1,-1,0x0,QObject(0x0) )
kate(19142)/kate-filetree KateFileTree::slotCurrentChanged: got doc, setting prev: QModelIndex(0,0,0x881c368,KateFileTreeProxyModel(0x8971190) )
kate(19142)/kate-filetree KateFileTreePluginView::viewChanged: END!
The program 'kate' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
(Details: serial 3610 error_code 3 request_code 20 minor_code 0)
(Note to programmers: normally, X errors are reported asynchronously;
that is, you will receive the error a while after causing it.
To debug your program, run it with the --sync command line
option to change this behavior. You can then get a meaningful
backtrace from your debugger if you break on the gdk_x_error() function.)
Sorry if some information is missing.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: kate 4:4.10.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.9.0-2.7-generic 3.9.3
Uname: Linux 3.9.0-2-generic i686
ApportVersion: 2.10.2-0ubuntu1
Architecture: i386
Date: Sat May 25 22:56:23 2013
InstallationDate: Installed on 2012-06-10 (349 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
MarkForUpload: True
SourcePackage: kate
UpgradeStatus: Upgraded to saucy on 2013-03-14 (72 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.