From kwin  Mon Nov 17 19:40:02 2008
From: "Guillaume Pothier" <gpothier () gmail ! com>
Date: Mon, 17 Nov 2008 19:40:02 +0000
To: kwin
Subject: clientArea crash
Message-Id: <8caa8ded0811171140l31cb4ee4l3cc460d28cf68642 () mail ! gmail ! com>
X-MARC-Message: https://marc.info/?l=kwin&m=122695085217243

Hi, I'm starting to chase down the famous bug #173017, where kwin
crashes in Workspace::clientArea. In the scenario I'm currently
investigating, the screen argument is -1, which is checked and
replaced by activeScreen() (around geometry.cpp:232). However,
activeScreen() also returns -1, hence the crash. The reason
activeScreen() returns -1 is that the active_screen field is -1, and
it is set to -1 in Workspace::takeActivity() (around
activation.cpp:375). And this happens because a client has -1 as its
screen. Is that a legal value for a client to have? What should be
checked here?
Cheers,
g
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