[REG 4.2 -> 4.3] Crash when building CMake project

1. Get the sources of Speedcrunch 0.11.
   I can send them to you if needed.
2. Open src/CMakeLists.txt in Creator.
3. Check the "Default" build configuration of a kit using Qt 4.8.
4. Click "Configure Project".
5. Try to build the project.
   Creator crashes:

   1   QString::replace                                                                                                                                                                                                                                                                       qstring.cpp                 2516 0x7ffff607cf2c 
   2   QString::replace                                                                                                                                                                                                                                                                       qstring.cpp                 2416 0x7ffff607c9eb 
   3   QmlJS::PersistentTrie::(anonymous namespace)::ReplaceInTrie::operator()                                                                                                                                                                                                                persistenttrie.cpp          293  0x7fffdfb2a852 
   4   QmlJS::PersistentTrie::enumerateTrieNode<QmlJS::PersistentTrie::(anonymous namespace)::ReplaceInTrie>                                                                                                                                                                                  persistenttrie.h            119  0x7fffdfb2d6c9 
   5   QmlJS::PersistentTrie::TrieNode::replaceF                                                                                                                                                                                                                                              persistenttrie.cpp          305  0x7fffdfb2a97c 
   6   QmlJS::PersistentTrie::Trie::replace                                                                                                                                                                                                                                                   persistenttrie.cpp          603  0x7fffdfb2cd32 
   7   QmlJS::QmlBundle::replaceVars                                                                                                                                                                                                                                                          qmljsbundle.cpp             119  0x7fffdfa651d7 
   8   QmlJSTools::BasicBundleProvider::mergeBundlesForKit                                                                                                                                                                                                                                    qmljsbundleprovider.cpp     150  0x7fffdf1dc551 
   9   QmlJSTools::setupProjectInfoQmlBundles                                                                                                                                                                                                                                                 qmljsmodelmanager.cpp       150  0x7fffdf1e4158 
   10  QmlJSTools::Internal::ModelManager::defaultProjectInfoForProject                                                                                                                                                                                                                       qmljsmodelmanager.cpp       129  0x7fffdf1e3d60 
   11  CMakeProjectManager::CMakeProject::updateQmlJSCodeModel                                                                                                                                                                                                                                cmakeproject.cpp            205  0x7fffdcfc64a4 
   12  CMakeProjectManager::CMakeProject::updateProjectData                                                                                                                                                                                                                                   cmakeproject.cpp            186  0x7fffdcfc62d9 
   13  CMakeProjectManager::Internal::CMakeBuildConfiguration::<lambda(const QString&)>::operator()(const QString &) const                                                                                                                                                                    cmakebuildconfiguration.cpp 153  0x7fffdcfeae70 
   14  QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<const QString&>, void, CMakeProjectManager::Internal::CMakeBuildConfiguration::ctor()::<lambda(const QString&)>>::call(CMakeProjectManager::Internal::CMakeBuildConfiguration::<lambda(const QString&)> &, void * *) qobjectdefs_impl.h          137  0x7fffdcfef056 
   15  QtPrivate::Functor<CMakeProjectManager::Internal::CMakeBuildConfiguration::ctor()::<lambda(const QString&)>, 1>::call<QtPrivate::List<QString const&>, void>(CMakeProjectManager::Internal::CMakeBuildConfiguration::<lambda(const QString&)> &, void *, void * *)                     qobjectdefs_impl.h          194  0x7fffdcfeeeba 
   16  QtPrivate::QFunctorSlotObject<CMakeProjectManager::Internal::CMakeBuildConfiguration::ctor()::<lambda(const QString&)>, 1, QtPrivate::List<const QString&>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void * *, bool *)                                                qobject_impl.h              168  0x7fffdcfeed3c 
   17  QtPrivate::QSlotObjectBase::call                                                                                                                                                                                                                                                       qobject_impl.h              101  0x7ffff62539bf 
   18  QMetaObject::activate                                                                                                                                                                                                                                                                  qobject.cpp                 3723 0x7ffff6250679 
   19  QMetaObject::activate                                                                                                                                                                                                                                                                  qobject.cpp                 3602 0x7ffff624ff7a 
   20  CMakeProjectManager::Internal::BuildDirManager::errorOccured                                                                                                                                                                                                                           moc_builddirmanager.cpp     164  0x7fffdd071c9a 
   ... <Mehr>                                                                                                                                                                                                                                                                                                                                 
   

Creator 4.2 did not crash in this situation.

Found by Squish test tst_cmake_speedcrunch.