Crash when splitting editor with .glsl files

Here is a way to crash Qt Creator 2.2.1:

Start Qt Creator. Open a .glsl file. Split the editor with ctrl-E 2, then remove the split, ctrl-e 0, then add another split, ctrl-e 3. The final split causes a crash.

It seems it's only happening with .glsl files, I cannot reproduce it with c++ files. If it's difficult to reproduce, send me an email and I can send you a .glsl file that makes it crash.

Here's a backtrace (not a debug-build, sorry)

0 TextEditor::BaseTextEditorWidget::mimeType() const /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libTextEditor.so 0 0x7fffe50c0c43
1 GLSLEditor::GLSLTextEditorWidget::languageVariant() const /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libGLSLEditor.so 0 0x7fffe12bb592
2 GLSLEditor::Internal::Highlighter::highlightBlock(QString const&) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libGLSLEditor.so 0 0x7fffe12c49f2
3 TextEditor::SyntaxHighlighterPrivate::reformatBlock(QTextBlock const&, int, int, int) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libTextEditor.so 0 0x7fffe512423a
4 TextEditor::SyntaxHighlighterPrivate::reformatBlocks(int, int, int) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libTextEditor.so 0 0x7fffe51243ac
5 TextEditor::SyntaxHighlighter::rehighlight() /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libTextEditor.so 0 0x7fffe512461d
6 GLSLEditor::GLSLTextEditorWidget::setFontSettings(TextEditor::FontSettings const&) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libGLSLEditor.so 0 0x7fffe12bc598
7 TextEditor::TextEditorSettings::initializeEditor(TextEditor::BaseTextEditorWidget*) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libTextEditor.so 0 0x7fffe510d56e
8 GLSLEditor::Internal::GLSLEditorPlugin::initializeEditor(GLSLEditor::GLSLTextEditorWidget*) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libGLSLEditor.so 0 0x7fffe12bfbe0
9 GLSLEditor::Internal::GLSLEditorEditable::duplicate(QWidget*) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libGLSLEditor.so 0 0x7fffe12bbc0f
10 Core::EditorManager::duplicateEditor(Core::IEditor*) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libCore.so 0 0x7fffece7c5ff
11 Core::Internal::SplitterOrView::split(Qt::Orientation) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libCore.so 0 0x7fffece8fee3
12 Core::EditorManager::split(Qt::Orientation) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libCore.so 0 0x7fffece7e47a
13 Core::EditorManager::qt_metacall(QMetaObject::Call, int, void**) /home/ola/bin/qtcreator_src/qt-creator-2.2.1-src/lib/qtcreator/plugins/Nokia/libCore.so 0 0x7fffecf1781d
14 QMetaObject::activate qobject.cpp 3287 0x7ffff66b55f8
15 QAction::triggered moc_qaction.cpp 263 0x7ffff6eb8122
16 QAction::qt_metacall moc_qaction.cpp 167 0x7ffff6eb9777
17 QMetaObject::activate qobject.cpp 3287 0x7ffff66b55f8
18 QAction::triggered moc_qaction.cpp 263 0x7ffff6eb8122
19 QAction::activate qaction.cpp 1257 0x7ffff6eb830f
20 QAction::event qaction.cpp 1183 0x7ffff6eb847f
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