Program: 92386
Project: 92386
Buggy source:
public void mergeMixins() throws MavenExecutionException {
  List<Mixin> mixinList=new ArrayList<>();
  Map<String,Mixin> mixinMap=new HashMap<String,Mixin>();
  fillMixins(mixinList,mixinMap,mavenProject.getModel());
  MixinModelProblemCollector problems=new MixinModelProblemCollector();
  ModelBuildingRequest request=new DefaultModelBuildingRequest(modelBuildingRequest);
  request.setSystemProperties(mavenSession.getSystemProperties());
  request.setUserProperties(mavenSession.getUserProperties());
  Set<String> mixinProfiles=new HashSet<String>();
  for (  Mixin mixin : mixinList) {
    logger.debug(String.format("String_Node_Str",mixin.getKey(),mavenProject.getFile()));
    Model mixinModel=mixinModelCache.getModel(mixin,mavenProject);
    if (mixin.isActivateProfiles()) {
      logger.debug(String.format("String_Node_Str",mixin.getKey(),mavenProject.getFile()));
      mixinModel=mixinModel.clone();
      List<Profile> activePomProfiles=profileSelector.getActiveProfiles(mixinModel.getProfiles(),getProfileActivationContext(),problems);
      for (      Profile profile : activePomProfiles) {
        logger.debug(String.format("String_Node_Str",profile.getId(),mixin.getKey(),mavenProject.getFile()));
        profileInjector.injectProfile(mixinModel,profile,modelBuildingRequest,problems);
        mixinProfiles.add(profile.getId());
      }
    }
    reportingConverter.convertReporting(mixinModel,request,problems);
    mixin.merge(mixinModel,mavenProject,mavenSession,mixinModelMerger);
  }
  if (mixinList.size() > 0) {
    mixinModelMerger.applyPluginManagementOnPlugins(mavenProject.getModel());
    modelInterpolator.interpolateModel(mavenProject.getModel(),mavenProject.getBasedir(),request,problems);
    pluginConfigurationExpander.expandPluginConfiguration(mavenProject.getModel(),request,problems);
    if (mavenProject.getInjectedProfileIds().containsKey(Profile.SOURCE_POM)) {
      mavenProject.getInjectedProfileIds().get(Profile.SOURCE_POM).addAll(mixinProfiles);
    }
 else {
      mavenProject.getInjectedProfileIds().put(Profile.SOURCE_POM,new ArrayList<String>(mixinProfiles));
    }
    problems.checkErrors(mavenProject.getFile());
    setupMaven33DistributionManagement(mavenProject);
  }
}

Fixed version (ground truth):
public void mergeMixins() throws MavenExecutionException {
  List<Mixin> mixinList=new ArrayList<>();
  Map<String,Mixin> mixinMap=new HashMap<String,Mixin>();
  fillMixins(mixinList,mixinMap,mavenProject.getModel());
  MixinModelProblemCollector problems=new MixinModelProblemCollector();
  ModelBuildingRequest request=new DefaultModelBuildingRequest(modelBuildingRequest);
  request.setSystemProperties(mavenSession.getSystemProperties());
  request.setUserProperties(mavenSession.getUserProperties());
  Set<String> mixinProfiles=new HashSet<String>();
  for (  Mixin mixin : mixinList) {
    logger.debug(String.format("String_Node_Str",mixin.getKey(),mavenProject.getFile()));
    Model mixinModel=mixinModelCache.getModel(mixin,mavenProject);
    if (mixin.isActivateProfiles()) {
      logger.debug(String.format("String_Node_Str",mixin.getKey(),mavenProject.getFile()));
      mixinModel=mixinModel.clone();
      List<Profile> activePomProfiles=profileSelector.getActiveProfiles(mixinModel.getProfiles(),getProfileActivationContext(),problems);
      for (      Profile profile : activePomProfiles) {
        logger.debug(String.format("String_Node_Str",profile.getId(),mixin.getKey(),mavenProject.getFile()));
        profileInjector.injectProfile(mixinModel,profile,modelBuildingRequest,problems);
        mixinProfiles.add(profile.getId());
      }
    }
    boolean hasReporting=mavenProject.getModel().getReporting() != null;
    if (hasReporting) {
      removeSitePluginReportPlugins(mavenProject.getModel());
    }
    mixin.merge(mixinModel,mavenProject,mavenSession,mixinModelMerger);
    if (hasReporting) {
      reportingConverter.convertReporting(mavenProject.getModel(),request,problems);
    }
  }
  if (mixinList.size() > 0) {
    mixinModelMerger.applyPluginManagementOnPlugins(mavenProject.getModel());
    modelInterpolator.interpolateModel(mavenProject.getModel(),mavenProject.getBasedir(),request,problems);
    pluginConfigurationExpander.expandPluginConfiguration(mavenProject.getModel(),request,problems);
    if (mavenProject.getInjectedProfileIds().containsKey(Profile.SOURCE_POM)) {
      mavenProject.getInjectedProfileIds().get(Profile.SOURCE_POM).addAll(mixinProfiles);
    }
 else {
      mavenProject.getInjectedProfileIds().put(Profile.SOURCE_POM,new ArrayList<String>(mixinProfiles));
    }
    problems.checkErrors(mavenProject.getFile());
    setupMaven33DistributionManagement(mavenProject);
  }
}