Fist set the display name then addBuildConfiguration on clone

src/plugins/cmakeprojectmanager/cmakeproject.cpp

@@ -138,7 +138,6 @@ BuildConfiguration *CMakeBuildConfigurationFactory::clone(ProjectExplorer::Build
 {
     CMakeBuildConfiguration *old = static_cast<CMakeBuildConfiguration *>(source);
     CMakeBuildConfiguration *bc = new CMakeBuildConfiguration(old);
-    m_project->addBuildConfiguration(bc);
     return bc;
 }
 

src/plugins/genericprojectmanager/genericproject.cpp

@@ -159,7 +159,6 @@ BuildConfiguration *GenericBuildConfigurationFactory::create(const QString &type
 BuildConfiguration *GenericBuildConfigurationFactory::clone(BuildConfiguration *source) const
 {
     GenericBuildConfiguration *bc = new GenericBuildConfiguration(static_cast<GenericBuildConfiguration *>(source));
-    m_project->addBuildConfiguration(bc);
     return bc;
 }
 

src/plugins/projectexplorer/buildconfiguration.h

@@ -114,7 +114,7 @@ public:
     // project mode for editing
     virtual BuildConfiguration *create(const QString &type) const = 0;
 
-    // clones a given BuildConfiguration and adds it to the project
+    // clones a given BuildConfiguration, should not add it to the project
     virtual BuildConfiguration *clone(BuildConfiguration *source) const = 0;
 
     // restores a BuildConfiguration with the name and adds it to the project

src/plugins/projectexplorer/buildsettingspropertiespage.cpp

@@ -339,6 +339,7 @@ void BuildSettingsWidget::cloneConfiguration(BuildConfiguration *sourceConfigura
 
     m_buildConfiguration = m_project->buildConfigurationFactory()->clone(sourceConfiguration);
     m_buildConfiguration->setDisplayName(newDisplayName);
+    m_project->addBuildConfiguration(m_buildConfiguration);
 
     updateBuildSettings();
 }

src/plugins/qt4projectmanager/qt4project.cpp

@@ -298,7 +298,6 @@ BuildConfiguration *Qt4BuildConfigurationFactory::clone(BuildConfiguration *sour
 {
     Qt4BuildConfiguration *oldbc = static_cast<Qt4BuildConfiguration *>(source);
     Qt4BuildConfiguration *newbc = new Qt4BuildConfiguration(oldbc);
-    m_project->addBuildConfiguration(newbc);
     return newbc;
 }