Qt Creator Manual | Known Issues

Qt Creator Manual 4.4.0

Tips and Tricks ◦ Glossary

# Known Issues

This section lists known issues in Qt Creator version 4.4.0. The development team is aware of them, and therefore, you do not need to report them as bugs.

For a list of fixed issues and added features, see the changelog file in the `qtcreator\dist` folder or the Qt Bug Tracker.

## General Issues

- If you change the Input Languages in Windows, Qt Creator might not respond for 30 seconds. This is a known issue in the Advanced Text Service of Microsoft Windows.
- Qt Creator uses SQLite for storing some of its settings. SQLite is known to have problems with certain NFS servers (most notably the nfs-user-server 2.2beta), since they can lock up the application when it tries to lock the database. If your home directory is on an NFS share and you encounter this issue, one option would be to switch to the nfs-kernel-server, or create a symlink so that the settings are stored locally.
- Qt 4.7.4 is known to contain a bug exposed by g++ 4.6 which triggers a crash in Qt Creator. For more information, see QTBUG-21265
- The Okteta KDE custom widget plugin might be installed as part of some Linux distributions. It can cause Qt Designer to crash. For more information, see:
  - Ubuntu bug 662005
  - QTBUG-12025

  To resolve the issue, enter the following command to remove the package:

        sudo apt-get remove okteta

  Or delete the following file: `/usr/lib/kde4/plugins/designer/oktetadesignerplugin.so`.

## Editing Issues

- Code completion does not support typedefs for nested classes.

## Projects Issues

- Paths or file names containing spaces or special characters (such as colons, dollar signs, and hash marks) may cause problems. This is because some of the tools Qt Creator uses in the background have restrictions on the characters allowed in file and directory names. To be on the safe side, we recommend creating projects and project items with names consisting of plain characters, numbers, underscores, and hyphens.
- If error messages displayed in the Compile Output pane contain paths where slashes are missing (for example, C:QtSDK), check your PATH variable. For more information, see Troubleshooting MinGW Compilation Errors.

## Debugging Issues

- When debugging executables created by the GNU Compiler version 4.5.0 (all platforms), some data types will not be displayed in the Locals and Expressions view due to missing debug information.
- GDB on Windows may not work if the 'Embassy ® Security Center' software by 'Wave ® Systems' is installed and active (causing crashes in `vxvault.dll)`).
- GDB may take long to load debugging symbols, especially from large libraries.
- Setting breakpoints in code that is compiled into the binary more than once does not work.
- Setting breakpoints in files that do not have unique absolute paths may fail. For example, remounting parts of a file system using the --bind mount option.
- A regression in GCC 4.5.0 causes return value optimization to produce inaccurate debug info that GCC applies also to non-optimized builds. For more information, see GCC Bugzilla - Bug 44731.

## Qt Quick Designer Issues

- Qt Quick Designer uses a QML emulation layer (QML Puppet) to render and preview images and to collect data. Executing C++ code might cause the QML emulation layer to crash. If it crashes, an error message is displayed and you can continue editing the QML file in the code editor.

Tips and Tricks ◦ Glossary