Program: 37373
Project: 37373
Buggy source:
private List<ResolutionItem> resolveMainClassCore() throws CoreException {
  IJavaSearchScope searchScope=SearchEngine.createWorkspaceScope();
  SearchPattern pattern=SearchPattern.createPattern("String_Node_Str",IJavaSearchConstants.METHOD,IJavaSearchConstants.DECLARATIONS,SearchPattern.R_CASE_SENSITIVE | SearchPattern.R_EXACT_MATCH);
  ArrayList<ResolutionItem> res=new ArrayList<>();
  SearchRequestor requestor=new SearchRequestor(){
    @Override public void acceptSearchMatch(    SearchMatch match){
      Object element=match.getElement();
      if (element instanceof IMethod) {
        IMethod method=(IMethod)element;
        try {
          if (method.isMainMethod()) {
            IResource resource=method.getResource();
            if (resource != null) {
              IProject project=resource.getProject();
              if (project != null) {
                String mainClass=method.getDeclaringType().getFullyQualifiedName();
                IJavaProject javaProject=JdtUtils.getJavaProject(project);
                if (javaProject != null) {
                  String moduleName=JdtUtils.getModuleName(javaProject);
                  if (moduleName != null) {
                    mainClass=moduleName + "String_Node_Str" + mainClass;
                  }
                }
                String projectName=ProjectsManager.DEFAULT_PROJECT_NAME.equals(project.getName()) ? null : project.getName();
                res.add(new ResolutionItem(mainClass,projectName));
              }
            }
          }
        }
 catch (        JavaModelException e) {
        }
      }
    }
  }
;
  SearchEngine searchEngine=new SearchEngine();
  try {
    searchEngine.search(pattern,new SearchParticipant[]{SearchEngine.getDefaultSearchParticipant()},searchScope,requestor,null);
  }
 catch (  Exception e) {
  }
  return res.stream().distinct().collect(Collectors.toList());
}

Fixed version (ground truth):
private List<ResolutionItem> resolveMainClassCore() throws CoreException {
  IJavaSearchScope searchScope=SearchEngine.createWorkspaceScope();
  SearchPattern pattern=SearchPattern.createPattern("String_Node_Str",IJavaSearchConstants.METHOD,IJavaSearchConstants.DECLARATIONS,SearchPattern.R_CASE_SENSITIVE | SearchPattern.R_EXACT_MATCH);
  ArrayList<ResolutionItem> res=new ArrayList<>();
  SearchRequestor requestor=new SearchRequestor(){
    @Override public void acceptSearchMatch(    SearchMatch match){
      Object element=match.getElement();
      if (element instanceof IMethod) {
        IMethod method=(IMethod)element;
        try {
          if (method.isMainMethod()) {
            IResource resource=method.getResource();
            if (resource != null) {
              IProject project=resource.getProject();
              if (project != null) {
                String mainClass=method.getDeclaringType().getFullyQualifiedName();
                IJavaProject javaProject=JdtUtils.getJavaProject(project);
                if (javaProject != null) {
                  String moduleName=JdtUtils.getModuleName(javaProject);
                  if (moduleName != null) {
                    mainClass=moduleName + "String_Node_Str" + mainClass;
                  }
                }
                String projectName=ProjectsManager.DEFAULT_PROJECT_NAME.equals(project.getName()) ? null : project.getName();
                res.add(new ResolutionItem(mainClass,projectName));
              }
            }
          }
        }
 catch (        JavaModelException e) {
        }
      }
    }
  }
;
  SearchEngine searchEngine=new SearchEngine();
  try {
    searchEngine.search(pattern,new SearchParticipant[]{SearchEngine.getDefaultSearchParticipant()},searchScope,requestor,null);
  }
 catch (  Exception e) {
    logger.log(Level.SEVERE,String.format("String_Node_Str",e.toString()),e);
  }
  return res.stream().distinct().collect(Collectors.toList());
}