Linguist crashes when closing one of the ts files

To reproduce the crash:
1) open linguist
2) load a ts file
3) load a second ts file of an other language in the same instance of linguist
4) close the second ts file (menu file-> close ...)
5) enjoy

Here is the backtrace of the release version:
#0 0x00007fe8f4ee4954 in QWidget::isActiveWindow (this=0x0) at kernel/qwidget.cpp:6337
#1 0x0000000002999de0 in ?? ()
#2 0x0000000000000001 in ?? ()
#3 0x000000000047e132 in MessageEditor::activeTranslation (this=<value optimized out>) at messageeditor.cpp:411
#4 0x0000000000482de5 in QWidget::setFocus (this=0x2396b80, model=0) at ../../../include/QtGui/../../src/gui/kernel/qwidget.h:416
#5 MessageEditor::messageModelDeleted (this=0x2396b80, model=0) at messageeditor.cpp:262
#6 0x00000000004a5ce6 in MessageEditor::qt_metacall (this=0x2396b00, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff73fd9bc0) at .moc/release-shared/moc_messageeditor.cpp:152
#7 0x00007fe8f49aed83 in QMetaObject::activate (sender=0x237b270, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x2334780) at kernel/qobject.cpp:3274
#8 0x00000000004a6c5f in MultiDataModel::modelDeleted (this=0x0, _t1=1) at .moc/release-shared/moc_messagemodel.cpp:219
#9 0x000000000048e948 in MultiDataModel::close (this=0x237b270, model=1) at messagemodel.cpp:763
#10 0x00000000004716c2 in MainWindow::closeFile (this=0x7fff73fdb460) at mainwindow.cpp:730
#11 0x00000000004a53fd in MainWindow::qt_metacall (this=0x7fff73fdb460, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff73fd9e00) at .moc/release-shared/moc_mainwindow.cpp:184
#12 0x00007fe8f49aed83 in QMetaObject::activate (sender=0x2324650, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x2334780) at kernel/qobject.cpp:3274
#13 0x00007fe8f4e8e3d2 in QAction::triggered (this=0x0, _t1=7) at .moc/release-shared/moc_qaction.cpp:263
#14 0x00007fe8f4e903bb in QAction::activate (this=0x2324650, event=<value optimized out>) at kernel/qaction.cpp:1233
#15 0x00007fe8f52c865d in ~ExceptionGuard (this=<value optimized out>, causedStack=..., action=0x2324650, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:981
#16 QMenuPrivate::activateCausedStack (this=<value optimized out>, causedStack=..., action=0x2324650, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1033
#17 0x00007fe8f52ce05a in QMenuPrivate::activateAction (this=0x2329770, action=0x2324650, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1053
#18 0x00007fe8f4ee9ad9 in QWidget::event (this=0x2329740, event=0x7fff73fda940) at kernel/qwidget.cpp:7970
#19 0x00007fe8f52d02db in QMenu::event (this=0x0, e=0x7) at widgets/qmenu.cpp:2356
#20 0x00007fe8f4e943fc in QApplicationPrivate::notify_helper (this=0x2217640, receiver=<value optimized out>, e=0x7fff73fda940) at kernel/qapplication.cpp:4245
#21 0x00007fe8f4e9b271 in QApplication::notify (this=0x7fff73fdb8a0, receiver=0x2329740, e=0x7fff73fda940) at kernel/qapplication.cpp:3821
#22 0x00007fe8f499c0cc in QCoreApplication::notifyInternal (this=0x7fff73fdb8a0, receiver=0x2329740, event=0x7fff73fda940) at kernel/qcoreapplication.cpp:704
#23 0x00007fe8f4e9a3e6 in QCoreApplication::sendSpontaneousEvent (receiver=0x2329740, event=0x7fff73fda940, alienWidget=0x0, nativeWidget=0x2329740, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>,
spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#24 QApplicationPrivate::sendMouseEvent (receiver=0x2329740, event=0x7fff73fda940, alienWidget=0x0, nativeWidget=0x2329740, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, spontaneous=true)
at kernel/qapplication.cpp:2954
#25 0x00007fe8f4f18905 in QETWidget::translateMouseEvent (this=0x2329740, event=<value optimized out>) at kernel/qapplication_x11.cpp:4302
#26 0x00007fe8f4f171ca in QPointer<QWidget>::operator= (this=<value optimized out>, event=0x7fff73fdb0c0) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:68
#27 QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff73fdb0c0) at kernel/qapplication_x11.cpp:3499
#28 0x00007fe8f4f4159a in x11EventSourceDispatch (s=0x2225350, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:130
#29 0x00007fe8f345ebbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x00007fe8f3462588 in ?? () from /lib/libglib-2.0.so.0
#31 0x00007fe8f34626b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x00007fe8f49c5633 in QEventDispatcherGlib::processEvents (this=0x2221740, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qeventdispatcher_glib.cpp:407
#33 0x00007fe8f4f4119e in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qguieventdispatcher_glib.cpp:198
#34 0x00007fe8f499a9f2 in QEventLoop::processEvents (this=<value optimized out>, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qeventloop.cpp:147
#35 0x00007fe8f499adcc in QEventLoop::exec (this=0x7fff73fdb3e0, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
) at kernel/qeventloop.cpp:201
#36 0x00007fe8f499eb0b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:979
#37 0x000000000045e2d4 in main (argc=2, argv=<value optimized out>) at main.cpp:120