From e27baeff28d6792178a967618ca12ee7bfc91735 Mon Sep 17 00:00:00 2001 From: Fabien Freling Date: Tue, 12 Apr 2011 16:23:57 +0200 Subject: [PATCH] Fix a race condition when the main window is being destructed. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the destructor of QWidget, we delete the layout. If the layout is not set to 0 afterwards, a check on the layout might turn true, but any access will end with a segfault. Reviewed-by: João Abecasis (cherry picked from commit abc5a632942c23496d75c49b3b0b4a674cdafdf8) --- src/gui/kernel/qwidget.cpp | 1 + src/gui/painting/qunifiedtoolbarsurface_mac.cpp | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp index 5705214762..758cccefdc 100644 --- a/src/gui/kernel/qwidget.cpp +++ b/src/gui/kernel/qwidget.cpp @@ -1588,6 +1588,7 @@ QWidget::~QWidget() // delete layout while we still are a valid widget delete d->layout; + d->layout = 0; // Remove myself from focus list Q_ASSERT(d->focus_next->d_func()->focus_prev == this); diff --git a/src/gui/painting/qunifiedtoolbarsurface_mac.cpp b/src/gui/painting/qunifiedtoolbarsurface_mac.cpp index 3876c3d1a2..2fda6b9555 100644 --- a/src/gui/painting/qunifiedtoolbarsurface_mac.cpp +++ b/src/gui/painting/qunifiedtoolbarsurface_mac.cpp @@ -152,7 +152,8 @@ void QUnifiedToolbarSurface::beginPaint(const QRegion &rgn) void QUnifiedToolbarSurface::updateToolbarOffset(QWidget *widget) { QMainWindowLayout *mlayout = qobject_cast (widget->window()->layout()); - mlayout->updateUnifiedToolbarOffset(); + if (mlayout) + mlayout->updateUnifiedToolbarOffset(); } void QUnifiedToolbarSurface::flush(QWidget *widget, const QRegion ®ion, const QPoint &offset)