| Qt 5.12.2 is a bug-fix release. It maintains both forward and backward |
| compatibility (source and binary) with Qt 5.12.0 through 5.12.1. |
| |
| For more details, refer to the online documentation included in this |
| distribution. The documentation is also available online: |
| |
| https://doc.qt.io/qt-5/index.html |
| |
| The Qt version 5.12 series is binary compatible with the 5.11.x series. |
| Applications compiled for 5.11 will continue to run with 5.12. |
| |
| Some of the changes listed in this file include issue tracking numbers |
| corresponding to tasks in the Qt Bug Tracker: |
| |
| https://bugreports.qt.io/ |
| |
| Each of these identifiers can be entered in the bug tracker to obtain more |
| information about a particular change. |
| |
| **************************************************************************** |
| * QtQml * |
| **************************************************************************** |
| |
| - Important Behavior Changes: |
| * The parameters passed to C++ functions from QML are now checked for |
| compatibility with the expected arguments. If they cannot be |
| converted, a warning is printed. In future versions of Qt a type error |
| will be thrown in JavaScript and the function will not be invoked. |
| |
| * [QTBUG-73239] Removed revisions from the new Qt.labs.settings methods |
| and properties that were introduced in 5.12. Qt.labs plugins are |
| intended to always have revision 1.0 until they graduate. |
| |
| - QQmlApplicationEngine: |
| * [QTBUG-73649] QQmlApplicationEngine connects quit() and exit() signals |
| with queued connections to avoid problems with AutoConnection, when |
| connecting to QCoreApplication slots. |
| |
| - [QTBUG-69340] QML cache files are not unnecessarily re-generated. |
| - [QTBUG-71325] Fixed a crash in V4 string to number conversion on 32-bit |
| platforms. |
| - [QTBUG-72137] Fixed a crash in QML garbage collector when accessing |
| other items from Component.onDestruction. |
| - [QTBUG-72352] QML can be built with -no-feature-translation. |
| - [QTBUG-72407] We now annotate stack traces when frames are elided |
| through tail calls. |
| - [QTBUG-72734] Fixed a crash in the parser on certain kinds of bad input. |
| - [QTBUG-72858] Exception handlers are correctly scoped for try blocks and |
| for "for ... in" loops. |
| - [QTBUG-72908] QML can be built with -c++std=c++11 again. |
| - [QTBUG-72972] QQmlMetaType deletes attached properties in its destructor |
| to avoid a crash. |
| - [QTBUG-73009] Fixed a crash with qt.qml.binding.removal.info=true. |
| - [QTBUG-73013] If a signal sender is deleted during the handling of the |
| signal in QML, the QML engine won't crash anymore. |
| - [QTBUG-73152] Brought behavior of String.replace() in line with other |
| JS engines: "x".replace("x", "$1") gives "$1" in both JSC and V8, as there |
| are no captures that could be used as a replacement for $1. Two-digit |
| captures ($nm) get applied if $nm captures exist. If there are less than nm |
| but more than n captures available $n is replaced by the n'th capture and m |
| is copied over verbatim. |
| - [QTBUG-73425] Fixed allocation of large arrays at startup. |
| - [QTBUG-73733] Fixed an access-after-delete crash in DelegateModel. |
| - [QTBUG-73734] When a Q_GADGET type, marked as a primitive type with |
| Q_DECLARE_METATYPE, is emitted with a signal, it can now be accessed in QML. |
| - [QTBUG-73750] Fixed undefined Q_ENUM value in QML Connections object. |
| - [QTBUG-73821] Fixed a failing assert on 32bit platforms. |
| - The JIT compiler is disabled for the IPL32 (or X32) ABI. It did not work |
| before. |
| - The tail call optimization correctly counts method arguments on 32bit |
| platforms now. |
| - The JavaScript engine now tolerates UINT_MAX as array index. |
| |
| **************************************************************************** |
| * QtQuick * |
| **************************************************************************** |
| |
| - TextInput/security: |
| * When the TextInput is used for password input, preallocate a buffer |
| for the string that stores the entered value and zero-out the string |
| on TextInput destruction to avoid leaking sensitive data to process |
| memory |
| |
| - [QTBUG-63271] If a MouseArea sets itself invisible or disabled while |
| handling a mouse press, it does not acquire the exclusive grab |
| - [QTBUG-71887] TapHandler now consistently forgets touchpoints that occur |
| outside its parent's bounds. This eliminates the warning "pointId is |
| missing from current event, but was neither canceled nor released" when |
| tapping quickly and having some of the taps fall out of bounds. |
| (The warning still exists though, in case there are other scenarios where |
| Handlers remember "wanting" certain touchpoints and then they go missing.) |
| - [QTBUG-72822] PinchHandler now correctly holds its target in place when |
| axes are disabled. |
| - [QTBUG-71918] PointerHandlers are declared as direct children of |
| Flickable (ListView, TableView etc.) now get the pointer events properly. |
| - [QTBUG-42155] Canvas now handles switching between object and string |
| based colors |
| - [QTBUG-73113] Fixed a crash when reparenting QML Canvas items |
| - [QTBUG-73013] Fixed a crash in QuickView on setSource while deleting |
| the sender. |
| - [QT3DS-1419] Improved quality of Qt 3D Studio text labels. |