Relevant known Qt bugs

<table> <tr> <th>ID</th> <th>Type</th> <th>Description</th> <th>Status</th> <th>Fix Target</th> <th>Severity</th> <th>Comments</th> </tr> <tr> <td>[QTBUG-49870](https://bugreports.qt.io/browse/QTBUG-49870)</td> <td>Bug</td> <td>On Windows, any application using QtDBus will hang when exiting</td> <td>Fixed</td> <td>5.6</td> <td>high</td> <td></td> </tr> <tr> <td>[I596358eb](https://codereview.qt-project.org/#/c/168405/)</td> <td>Bug</td> <td>Unintended implicit conversion from [QLatin1String]{.title-ref} to [QString]{.title-ref} in [QJsonObject]{.title-ref}</td> <td>Fixed</td> <td>5.7.1</td> <td>high</td> <td>For JSON performance</td> </tr> <tr> <td>[QTBUG-57696](https://bugreports.qt.io/browse/QTBUG-57696)</td> <td>Bug</td> <td>Build with Clang on Windows is broken (Qt 5.7.1)</td> <td>Reported</td> <td>5.8.1</td> <td>low</td> <td>[Workaround](https://codereview.qt-project.org/#/c/180240/)</td> </tr> <tr> <td>[QTBUG-57695](https://bugreports.qt.io/browse/QTBUG-57695)</td> <td>Bug</td> <td>Visual Studio IDE only: [moc]{.title-ref} always regenerates all files even if nothing changed (Qt 5.8.0)</td> <td>Fixed</td> <td>5.8.0</td> <td>low</td> <td>[Workaround](https://bugreports.qt.io/browse/QTBUG-57695)</td> </tr> <tr> <td></td> <td>Feature</td> <td>[QJsonObject::insert]{.title-ref} and [operator[]]{.title-ref} not optimized for [QLatin1String]{.title-ref}</td> <td>Reported</td> <td>{icon question}</td> <td>high</td> <td>For JSON performance</td> </tr> <tr> <td>[QTBUG-53031](https://bugreports.qt.io/browse/QTBUG-53031)</td> <td>Bug</td> <td>Windows application deadlocks on exit when unloading a library connected to DBus</td> <td>Fixed</td> <td>5.8.1</td> <td>low</td> <td>Fixed in 5.6 but regressed again in 5.8.0</td> </tr> <tr> <td>[QTBUG-51543](https://bugreports.qt.io/browse/QTBUG-51543)</td> <td>Bug</td> <td>[QNetworkAccessManager]{.title-ref} spuriously becomes [NotAccessible]{.title-ref} on Windows, app must be restarted</td> <td>Fixed {icon question}</td> <td>5.8.1</td> <td>high</td> <td>Fix awaiting confirmation</td> </tr> <tr> <td>[QTBUG-75361](https://bugreports.qt.io/browse/QTBUG-75361)</td> <td>Bug</td> <td>Stylesheets not applied to all widgets</td> <td>Open</td> <td>5.12.4, 5.13</td> <td>high</td> <td></td> </tr> </table>

Last modified 28.06.2020: Add content (0e00ae5)