Revision control
++ Qt 4.4.1 is a bug-fix release. It maintains both forward and backward
++ compatibility (source and binary) with Qt 4.4.0.
++
++ The Qt version 4.4 series is binary compatible with the 4.3.x series.
++ The Qt for Embedded Linux version 4.4 series is binary compatible with
++ the Qtopia Core 4.3.x series. Applications compiled for 4.0, 4.1, 4.2,
++ and 4.3 will continue to run with 4.4.
++
++ Some of the changes listed in this file include issue tracking numbers
++ corresponding to tasks in the Task Tracker:
++
++
++ Each of these identifiers can be entered in the task tracker to obtain
++ more information about a particular change.
++
++ ****************************************************************************
++ * General *
++ ****************************************************************************
++
++ General Improvements
++ --------------------
++
++ - Documentation and Examples
++ * [202630] Fixed a problem in the network/http example: it couldn't
++ download anything if the URL had a space.
++
++ Third party components
++ ----------------------
++
++ - Updated Qt's libpng version to 1.2.29.
++
++
++ ****************************************************************************
++ * Library *
++ ****************************************************************************
++ - QAbstractItemView
++ * [199822] Fixed issue with broken extended selections.
++
++ - QButtonGroup
++ * [209485] Prevented a crash caused by removing a button from its button
++ group while inside a slot triggered by the button's clicked() signal.
++
++ - QDirModel
++ * [213519] Fix crashes when drag'n'dropping files into a subdirectory
++
++ - QFtp
++ * [189374] Fixed a bug that would cause QFtp to fail to parse
++ dates if the application was being run on some locales, like fr_FR.
++
++ - QGraphicsProxyWidget
++ * [208773] Input methods now work properly for embedded widgets.
++ * [207644] Fixed a bug where the painter was restored incorrectly.
++
++ - QGraphicsScene
++ * [209125] QGraphicsScene::style() and QGraphicsWidget::style() fixes.
++ * [202774] [207076] Focus and activation fixes for embedded widgets.
++ * [212950] The scene no longer removes focus from the focus item if a
++ mouse press propagates to the scene (and then to the view). This was
++ a behavior regression to QWidget.
++
++ - QString
++ * [205093] Printing QString after using replace()followed by truncate(-1) crashes
++ * [209078] Problem in QString::resize
++
++ - QGraphicsView
++ * [209154] Mouse replay regressions since 4.3 have been fixed.
++
++ - QObject
++ * Fixed a regression from 4.3 to 4.4 in QObject::receivers() where
++ the function would return >0 even after disconnection all
++ signals.
++
++ - QScriptEngine
++ * [208489] Made the instanceof operator work when used with
++ QMetaObject wrappers created by newQMetaObject().
++ * [206188] Fixed a bug that caused scripts to hang when using
++ "continue;" inside a switch-case block.
++ * [205473] Fixed a bug that caused slots to be called even when
++ argument conversion failed.
++
++ - QSslSocket
++ * [212177] QSslSocket::peerVerifyError() supports all errors now.
++ * [212022] Fixed a bug that would cause no default CA certificates
++ to be present in static Qt builds.
++ * [212412] Fixed a bug that could cause a deadlock in
++ waitForReadyRead() in encrypted mode.
++
++ - QtWebKit
++ * Ensured that relative URLs are converted to absolute URLs.
++ * Ensured that the cursor is changed into a resize cursor when hovering
++ over and dragging the resizeable frame borders.
++ * [206999] Fixed a problem which would make an empty URL being passed to
++ QWebPluginFactory::create()
++ * [208215] Fixed a bug that prevents linkClicked signal to be emitted
++ when opening a local HTML file.
++ * [208342] Ensured that the cursor is updated after a web frame or page
++ has finished loading.
++ * [210920] Fixed showing/hiding of the Web Inspector.
++ * [207050] Fixed input of characters into form elements using AltGr on Windows.
++ * Fixed a crash related to XML HTTP requests.
++ * Fixed QWebPage::acceptNavigationRequest not being called when opening new Windows.
++ * Fixed emission of linkClicked() signal when clicking on target=_blank links.
++ * Fixed painting artifacts when scrolling embedded widgets.
++ * Fixed logic errors in QWebHitTestResult::isNull() and QWebHistory::forward().
++ * Fixed encoding of [ and ] in the host part of URLs
++ * Fixed a crash related to QWebPage::unsupportedContent.
++ * Fixed a memory leak on application shutdown.
++ * Fixed painting errors when scrolling embedded widgets.
++ * Fixed support for custom cursors set on a QWebView.
++ * Fixed various build problems on Mac OS X, Windows and Solaris
++ * Fixed crash with CSS text transformations.
++ * Fixed infinite recursion when converting DOM objects with cyclic references to QVariants.
++
++ - QVariant
++ * [201918] QVariant convert to QDateTime warnings
++
++ - QWidget
++ * Fixed a regression when setting masks for splashscreens on Mac OS X Tiger.
++ * [210544] Fixed a regression where Qt::WA_PaintOnScreen widgets were painted on
++ top of overlapping siblings.
++ * [211796] Fixed a crash occurring when calling render() from a resize event.
++ * [210960] Fixed a regression where an invisible top-level widget was resized when calling render().
++ * [210822] Fixed a bug causing QGLWidgets to not behave correctly when setting window title.
++ * [208413] Fixed issues when creating a child widget of Qt::WA_PaintOnScreen widgets.
++
++ - QWidgetAction
++ * [207433] Fix enabling and disabling toolbar containings actions widget.
++
++ - QWorkspace
++ * [206368] Fixed a crash occurring when deleting a QWorkspaceChild.
++
++ - QPainter
++ * [186327] Fixed inconsistent outline and fill drawing for drawPolygon in
++ raster paint engine, where the fill would be visible outside the outlines
++ or there would be missing pixels between outline and fill.
++ * [208530] Fixed some drawing issues with projective transform related to
++ near-plane clipping.
++ * [209095] Fixed infinite loop that could occur on certain architectures on
++ rare occasions when drawing outlines.
++ * [208090] Fixed issue with outline drawing where subsequent points on a
++ path or polygon are equal according to qFuzzyCompare, but treated as
++ different, causing stroke artifacts.
++ * [206785] Fixed potential pixmap drawing artifacts when drawing stretched
++ pixmaps at non-integer coordinates.
++ * Fixed potential rect/line drawing issue when drawing on non-integer
++ offsets in raster paint engine.
++ * [209462] Fixed regression when redirecting widgets to another paint device.
++
++ - QPainterPath
++ * [209056] Fixes potential assert in the boolean operations (difference,
++ intersect, and union).
++
++ - QRasterPaintEngine
++ * [208644] Fixed a crash in qt_intersect_spans.
++
++ - QApplication
++ * [213116] Fixd a regression on Mac OS X where you could not access the
++ menu bar after minimizing a window with no click through.
++
++ - QColor
++ * [193671] Fixed a problem with QColor::setNamedColor() not returning the correct
++ alpha value for the "transparent" color.
++
++ - QMacStyle
++ * [212037] Adjusted the size of text in an editable combo box on Mac OS X Panther.
++ * [216905] Fix a regression when drawing table headers on Mac OS X Panther.
++
++ - QMainWindow
++ * [210216] Calling setCentralWidget, setMenuBar, setMenuWidget or setStatusBar
++ several times could cause a crash.
++ * [206870] Fixed a bug causing dual screen layouts to not restore correctly.
++
++ - QMdiArea
++ * [202657] Fixed focus issue when navigating between window with focus on the DockWidget
++ * [211302] Fixed a bug where the activation order was not respected when tiling and cascading.
++
++ - QOpengGLPaintEngine
++ * [208419] Fixed wrong clipping of widgets.
++
++ - QDockWidget
++ * [179989] Maximum size is now taken into account by the dock widget.
++
++ - QCommonStyle
++ * [204016] Fixed west tab positions.
++
++ - QCryptographicHash
++ * [206712] Fixed a bug that would make QCryptographicHash return
++ invalid results if you called result() before the last addData()
++ call.
++
++ - QTcpSocket
++ * [208948] Fixed a bug that would cause QTcpSocket and QSslSocket
++ not to flush all of their buffers if the socket disconnects and
++ reconnects.
++ * [182669/192445] Fixed a bug that would cause QTcpSocket to stop
++ emitting readyRead() if a previous waitForReadyRead() timed out.
++
++ - QDataStream
++ * [211301] Fixed an issue where Qt 2 and Qt 3 applications might
++ crash or hang when run under KDE 4.
++
++ - QDateTime
++ * [137698] Fixed a bug that caused QDateTime to perform weird
++ 1-hour jumps when dealing with dates in Daylight Savings Time.
++
++ - QSslCertificate
++ * [185067/186087] Fixed a bug that would cause QSslCertificate
++ parsing of certificate timestamps to be off by a few hours
++ (timezone issue).
++
++ - QFile
++ * [192752] Fixed a bug that would make QFile leak file descriptors
++ if QFile::handle() was called.
++
++ - QFileDialog
++ * [208383] Crash when a proxy model is set and multiple files are selected.
++ * [165503] DirectoryEntered not emitted when go-to-parent button is clicked.
++
++ - QFileInfo
++ * [212291] Fixed a bug that would cause QFileInfo to return empty
++ group or owner names for files under MacOS X and maybe some other
++ Unix platforms.
++
++ - QFuture
++ * [214874] Fixed possible deadlock when using nested calls to QtConcurrent::run().
++
++ - QGLContext
++ * [210427] In 4.4.0 we removed the automatic mipmap generation for
++ textures bound with QGLContext::bindTexture(). This change has been
++ reverted for compatibility reasons.
++ * [214078] Fixed a problem that caused OpenGL textures to always be
++ downscaled to 64x64 in size on Intel graphics hardware. This caused,
++ among other things, the Qt Demo to look utterly broken on these systems.
++
++ - QOpenGLPaintEngine
++ * [191777] Set default values for GL_PACK_*/GL_UNPACK_* values with
++ glPixelStore() when QPainter::begin() is called.
++ * [201167] Don't assume the GL error state is cleared when QPainter::begin()
++ is called. Clear the state explicitly before we make internal state checks.
++ * [204578] Fixed a problem where the GL error state was set on
++ some system because an extension enum was used unprotected.
++
++ - QHostInfo
++ * [213187] Made QHostInfo not issue IPv6 name lookups if the
++ machine does not have any IPv6 addresses configured (Unix change
++ only).
++
++ - QHttp
++ * [213220] Fixed a bug that could make QHttp open unencrypted
++ connections if HTTPS mode was requested but SSL support was not
++ present in Qt.
++ * [193738] Fixed a bug that would make QHttp continue reading the
++ HTTP server's response and emit a readyRead() signal even if
++ abort() had already been called.
++
++ - QNetworkAccessManager
++ * When a http 302 location url is not an encoded url try QUrl's human readable parsing for more compatibility with websites.
++
++ - QPainter
++ * [211403] Fixed handling of negative target rect offsets and negative
++ source offsets in QPainter::drawPixmap()/drawImage().
++
++ - QPixmap
++ * [202903] Fix an infinite recursion in QPixmap::fromImage() that occured
++ when converting mono images.
++ * [206174] Reverse the order of the tests done in QPixmap::hasAlpha()
++ in order to speed it up.
++ * [210275] Fixed a crash in QPixmap::resize().
++
++ - QSharedMemory
++ * Compile fix on QNX when QT_NO_SHAREDMEMORY was defined
++
++ - QStyleSheetStyle
++ * [179629] Fixed SpinBox with gradient background.
++ * [188305] Respect the max-with property for more elements (such as QTabBar::tab)
++ * [189951] Fixed the align: property for QTabBar
++ * [194149] Fixed the background:transparent property
++ * [198926] Fixed the background:none property on some component of the scrollbar
++ * [206238] Fixed inconsistency with rules without selector applied to widget. They
++ now always applies to all childs
++ * [207420] Fixed the ~= attribute selector.
++ * [207819] Fixed few performences issues.
++ * [208001] Fixed crash crash with QMenu[title=...] in the stylesheet.
++
++ - QHeaderView
++ * [207869] Fixed possible division by zero.
++
++ - QTableView
++ * [207270] Painting errors in reverse mode and when there was spans.
++ * [210608] Fixed regression in the handling of spanning cells.
++
++ - QTableWidget
++ * [213118] Fixed a bug where moving the first or the last row triggered an assert.
++
++ - QTreeView
++ * [213737] Fixed regression where ctrl+a would select all items regardless of the selection mode.
++ * [202355] Fixed issue where items inserted in a view with all header sections hidden did not show
++ themselves properly later.
++ * [211296] When a column is hidden QItemSelectionModel::selectedRows and QItemSelectionModel::selectedColumns returns the wrong values.
++
++ - QTreeWidget
++ * [305084] Fixed duplicate items that may appears when programaticaly
++ expanding items.
++ * [209590] itemSelectionChanged was being emited before item selection was updated
++
++ - Q3DragObject
++ * [203288] Fixed regression against Qt 3 so that the drag() function now correctly uses
++ MoveAction (and not CopyAction) as the default action.
++
++ - Q3TextBrowser
++ * [197836] Fix assert when zooming out.
++
++ - QTextDocument
++ * [204965] Fix html export to use indent as textIndent
++
++ - QTextBrowser
++ * [192803] Fix loading of files from resources with a resource prefix.
++
++ - QTextEdit
++ * [211617] Fixed crash when moving the first paragraph by drag and Drop
++
++ - QTextTable
++ * [194229] Fix removing of a row with merged cells causing a crash.
++ * [194253] Fix calling removeColumn on a Column with selectedCell causing an assert.
++ * Fix assert on selecting the whole table after an insert/remove of column.
++ * [175676] Fix calling of resize() making updates in layouting fail.
++
++ - QSpinBox
++ * [213137] Fixed thousand-delimiters to not show for value = INT_MIN.
++
++ - QScrollArea
++ * [210567] Fixed issues when scrolling a native widget.
++
++ - QScrollBar
++ * [209492] Fixed a bug causing the scroll bar actions to be invoked twice.
++
++ - QToolbBarLayout
++ * [207946] Prevented a crash caused by assuming that the parent widget always exists.
++
++ - QThreadPool
++ * Fixed issues with thread termination during dll unloading on windows. QThreadPool::
++ waitForDone() now completely stops all threads, on all platforms. In addition, the
++ QCoreApplication destructor now calls waitForDone() to make sure all threads are
++ stopped before the Qt dlls are unloaded.
++
++ - QNetworkReply
++ * [207283] Fixed support for HTTP 101 responses.
++ * Fixed parsing of cookies with special timezone specifiers.
++
++ - QWebHistory
++ * Fixed a bug where calling forward() would go backwards and not forwards.
++
++ - QFontMetrics
++ * [212485] Fixed boundingRect() returning the proper size when there is a tab.
++
++ - QItemDelegate
++ * [206762] Fixed painting when using a QBrush() for the text.
++
++ - QtXmlPatterns
++ * [207584] When using the same QXmlQuery for a new query then evaluateTo()
++ can return false even if the query is valid.
++ * [214180] Fixed fn:replace fails when inside function.
++ * Fixed crash when unary operator has empty sequence as operand.
++ * Fixed that axis preceding or descendant-or-self when combined with
++ function last() on a custom node model crashes.
++ * Fixed that xml:id is not whitespace normalized.
++ * Fixed that QXmlFormatter produces no output on single top-level text nodes.
++ * Fixed infinite loop triggered by fn:matches().
++ * Fixed crash when compiling one of the FunctX queries.
++
++ - VideoPlayer
++ * [210170] Fixed an issue that prevented VideoPlayer::play to start when
++ called with an argument.
++
++ - Accessibility
++ * [199241] Fix an issue where the screen reader would read the content of
++ a password line edit. The screen reader will now only read it if its Normal.
++
++ - QLocalSocket
++ * [210886] Fixed a bug that would cause QLocalSocket to overrun
++ its buffers on very long socket names.
++
++ ****************************************************************************
++ * Database Drivers *
++ ****************************************************************************
++
++
++ ****************************************************************************
++ * Platform Specific Changes *
++ ****************************************************************************
++
++ X11
++ ---
++ * [208354] Fixed a crash in Qt's XIM implementation when exiting
++ applications after using the skim input method.
++ * [207800] Fixed a regression from 4.3 to 4.4 where putting a
++ QX11EmbedContainer into a QWidgetStack would case the container
++ stay visible permanently.
++ * [207423] In QDesktopWidget, workaround a change in behavior in
++ newer X.Org X servers where Xinerama would always be used even
++ when using a multi-screen setup.
++ * [206139] Fixed a bug where Qt could incorrectly recurse into the
++ Xlib error handler (causing Xlib to assert).
++ * [207057] Fixed a regression from 4.3 to 4.4 where
++ QX11EmbedContainer would sometimes destroy the embedded client's
++ window.
++ * [209057] Fixed a Q3Process which triggered a "Do not delete
++ object" warning.
++ * QPrintDialog crashed on unix in some cases.
++ * [214103] Fixed a regression with string to double conversion
++ becoming locale-aware in QTextStream.
++ * [210922] Fix crash in input methods when toggling the InputMethodEnabled
++ attribute.
++ * [210831] Fixed a problem where preview pages in the QPrintPreviewDialog
++ would not appear or be drawn correctly on X servers without
++ Xrender support.
++ * [206165],[213457] Fixed bugs which show the wrong cursor on some widget.
++ * Fixed bug regarding the usage of encoded URLs in Phonon
++
++
++ Windows
++ -------
++
++ * [207888] Fixed a regression from 4.3 which caused crashes in
++ Assistant and Designer when an accessibility client is running
++ (this includes applications that query for accessibility
++ features, like Notepad++).
++ * Several fixes related to crashes and hangs when the user has an
++ accessibility client running in the background.
++ * [208782] Fixed a problem with non-cosmetic lines with widths < 2
++ not being printed correctly with certain printer drivers.
++ * [208859] Fixed a problem with strokes not being printed correctly. Both
++ the stroke offsets and thinkness of the stroke were sometimes printed
++ incorrectly.
++ * [206473] Entering UNC paths is slow in the Qt file dialog.
++ * [309241] Trying to stream mp3 content with phonon would cause a crash.
++ * [210115] Fixed a problem causing "mailto" links not to work when the
++ mail application path contains unexpanded environment variables.
++ * [203012] Fixed a problem where "WriteOnly named pipes" failed to
++ open using QFile.
++ * [205685] Fixed the handling of TranslateAccelerator for windows key messages.
++ * Add support for (not) embedding manifests in plugins, on Windows.
++ * [211893] Fixed a crash related to using QtDotNetStyle.
++
++
++ Mac OS X
++ --------
++ * Fix a regression where inserting widgets into native menus would cause
++ the program to crash.
++ * [209785] Fixed a regression from 4.3 to 4.4 in DeferredDelete
++ event handling.
++ * The "debuglibraries" binary package now includes dSYM bundles, which
++ makes it possible to debug with them.
++ * [207371] The CoreGraphics paint engine ignored the transform set
++ on a QBrush with QBrush::setTransform().
++ * Fixed insertation of 'space' char in QLineEdit when EISU key is being held down
++ * Fixed fullscreen widget not regaining full focus after a dialog has been shown
++ * Fixed bug regarding the usage of encoded URLs in Phonon
++ * [212719] Fixed a bug that could cause text drawn into a QImage to be clipped
++ incorrectly.
++ * [216563] Fixed a case where failing to get the display's colorspace
++ would result in many widget being painted all black.
++ * [216544, 213316] Fixed several accessibility-related crashes.
++ * [210401] Fixed memory leak in QWidget::setWindowIcon().
++ * [211195] Fixed problem that caused crashes with the Mac binary package
++ when entering long licensee names during the installation.
++
++ Qt for Embedded Linux
++ ---------------------
++
++ - QWSEmbedWidget
++ * Fixed propagation of the Qt::WindowStaysOnTopHint window property.
++
++ - QDirectPainter
++ * [209068] Fixed region coordinates for QDirectPainter when used on a
++ rotated screen.
++
++ - DirectFB screen driver
++ * Fixed window placements of windows with initial top-left coordinate (0,0).
++ * Improved deallocation of resources when an application exits unexpectedly.
++ * Fixed bug in QPixmap::rotate().
++ * Fixed QPixmap::fromImage() with an image of format QImage::Format_Indexed8
++ when compiling with QT_NO_DIRECTFB_PALETTE.
++ * Fixed small memory leak in QPainter::drawImage()
++
++ - LinuxFB screen driver
++ * Added a workaround screen driver when the kernel fails to report the
++ length of the color components.
++ * Improved performance of the non-accelerated screen cursor.
++ * Disable the console cursor in graphics mode.
++
++ - Tslib mouse driver
++ * [200995] Fixed crash when initialization fails.
++ * [207117] Improved filtering during calibration.
++
++ - Ahi screen driver
++ * Fixed link issue.
++ * Fixed QScreen::setMode().
++ * Improved support for different screen modes.
++
++ Qt for Windows CE
++ -----------------
++
++ * Support for Visual Studio 2008 added
++ * Improved QRegion to perform faster
++
++ ****************************************************************************
++ * Compiler Specific Changes *
++ ****************************************************************************
++
++ - [212852] Fixed GCC 4.3 compiler warnings.
++
++
++ ****************************************************************************
++ * Tools *
++ ****************************************************************************
++
++ - Build System
++ * [209866, 213084] Fix compilation errors in QtWebKit when using
++ GCC 3.4 with precompiled headers. Precompiled header support is
++ documented as experimental in the GCC 3.4 documentation, and as
++ such, precompiled header support is disabled by default with
++ this compiler.
++ * [212330] Correct Makefile generation for src/corelib, which
++ would sometimes include multiple qatomic.o targets.
++ * [210016] Fix a build failure on 64-bit Linux when using the
++ linux-*-32 mkspecs.
++ * [206966] Fixed compilation errors on Linux when building for the
++ MIPS architecture.
++ * [212132] Workaround compiler crash bug for Linux on
++ SPARC64. This is a generalization of a similar change done for
++ Solaris in the 4.3 series.
++ * [211326, 211703] Fixed compilation errors when using the Intel
++ C++ Compiler for Linux on IA-64 (Itanium) hardware.
++ * [171222] Ignore duplicate -L<path> options
++
++ - Assistant
++ * [212875] Don't sort the entries in the contents view according to the
++ help files names.
++ * [212444] Use the default help collection when registering or unregistering
++ help files without having a collection file specified.
++ * [210704] Make sure the sql-plugin is correctly used when building
++ Qt statically.
++ * [208834] When highlighting a find result, ensure that the active
++ highlighting color is used.
++ * Introduced the -assistant-webkit configure flag to make use of WebKit as
++ html renderer in Qt Assistant.
++
++
++ - Designer
++
++ * [213481] Fixed crash that occurs when encountering an invalid .ui file.
++ * [211422] Fixed a crash resulting from a conflict between the newly added
++ support for QScrollArea and custom widgets derived from QScrollArea.
++ * [209995] Fixed a bug in the property editor that caused it not to
++ select values in spin boxes on editing.
++ * [205448] Fixed a bug related to drag and drop and Windows accessibility.
++ * [205899] Removed the windowModality property for non-form children to
++ prevent it from locking up the form preview.
++ * [212077] Fixed retranslateUi call in case of combo box items
++ * [210866] Dynamic properties of type QByteArray are not converted anymore to type QString when reloading the form
++ * [207187] Designer's property editor has better colors in case of inverted color scheme
++ * [202257] The geometry of the resource dialog is saved in settings
++ * [211677] Remove a crash in case of reloading resources
++
++ - Linguist
++
++ - lupdate
++ * [209122] Fixed same-text heuristic missing existing plurals
++ * [212465] Standardize on the default context being empty, not "@default"
++
++ - lrelease
++
++
++ - rcc
++
++
++ - moc
++
++ * [189996] Fixed a bug that caused inline slots with throw()
++ declarations to be parsed incorrectly.
++ * [192552] Fixed a bug that caused "< ::" to be parsed incorrectly
++ (e.g. "QList< ::Foo>").
++ * [199427] Fixed the code generator so that it generates normal
++ spaces everywhere, no tabs.
++ * [204730] Fixed a skipt token after Q_PRIVATE_SLOT
++
++ - uic
++
++ * [205439] Added a warning that is printed when encountering
++ non-obvious Qt3 dependencies (qPixmapFromMimeSource).
++
++ - uic3
++
++ * [205834] Process non-ASCII filenames correctly.
++
++ - qmake
++
++
++ - configure
++
++ * Fixed auto-detection of the XKB library on old Unix systems
++ * Fixed auto-detection of getaddrinfo on old Unix systems
++
++ ****************************************************************************
++ * Plugins *
++ ****************************************************************************
++
++
++ ****************************************************************************
++ * Important Behavior Changes *
++ ****************************************************************************
++
++ Unix
++ ----
++ * [203063] Changed the behaviour of qFatal and Q_ASSERT to always
++ produce a SIGABRT signal in all build modes of Qt. (Previous
++ versions called the exit function if Qt was built in release mode)