Program: 91464
Project: 91464
Buggy source:
@Before public void setUp() throws Exception {
  IWorkspaceRoot root=ResourcesPlugin.getWorkspace().getRoot();
  FileUtils.mkdir(new File(root.getLocation().toFile(),"String_Node_Str"),true);
  gitDir=new File(new File(root.getLocation().toFile(),"String_Node_Str"),Constants.DOT_GIT);
  repository=FileRepositoryBuilder.create(gitDir);
  repository.create();
  project=root.getProject(TEST_PROJECT);
  project.create(null);
  project.open(null);
  IProjectDescription description=project.getDescription();
  description.setLocation(root.getLocation().append(TEST_PROJECT_LOC));
  project.move(description,IResource.FORCE,null);
  project2=root.getProject(TEST_PROJECT2);
  project2.create(null);
  project2.open(null);
  gitDir2=new File(project2.getLocation().toFile().getAbsoluteFile(),Constants.DOT_GIT);
  repository2=FileRepositoryBuilder.create(gitDir2);
  repository2.create();
  RepositoryMapping mapping=new RepositoryMapping(project,gitDir);
  RepositoryMapping mapping2=new RepositoryMapping(project2,gitDir2);
  GitProjectData projectData=new GitProjectData(project);
  GitProjectData projectData2=new GitProjectData(project2);
  projectData.setRepositoryMappings(Collections.singletonList(mapping));
  projectData.store();
  projectData2.setRepositoryMappings(Collections.singletonList(mapping2));
  projectData2.store();
  GitProjectData.add(project,projectData);
  GitProjectData.add(project2,projectData2);
  RepositoryProvider.map(project,GitProvider.class.getName());
  RepositoryProvider.map(project2,GitProvider.class.getName());
  File f=new File(repository.getWorkTree(),TEST_PROJECT + "String_Node_Str" + TEST_FILE);
  Writer fileWriter=new OutputStreamWriter(new FileOutputStream(f),"String_Node_Str");
  fileWriter.write("String_Node_Str");
  fileWriter.close();
  FileWriter fileWriter2=new FileWriter(new File(repository2.getWorkTree(),TEST_FILE2));
  fileWriter2.write("String_Node_Str");
  fileWriter2.close();
  project.refreshLocal(IResource.DEPTH_INFINITE,null);
  project2.refreshLocal(IResource.DEPTH_INFINITE,null);
  git=new Git(repository);
  git.add().addFilepattern("String_Node_Str").call();
  git.commit().setMessage("String_Node_Str").call();
  git=new Git(repository2);
  git.add().addFilepattern("String_Node_Str").call();
  git.commit().setMessage("String_Node_Str").call();
  git.branchRename().setNewName("String_Node_Str").call();
}

Fixed version (ground truth):
@Before public void setUp() throws Exception {
  IWorkspaceRoot root=ResourcesPlugin.getWorkspace().getRoot();
  FileUtils.mkdir(new File(root.getLocation().toFile(),"String_Node_Str"),true);
  gitDir=new File(new File(root.getLocation().toFile(),"String_Node_Str"),Constants.DOT_GIT);
  repository=FileRepositoryBuilder.create(gitDir);
  repository.create();
  project=root.getProject(TEST_PROJECT);
  project.create(null);
  project.open(null);
  IProjectDescription description=project.getDescription();
  description.setLocation(root.getLocation().append(TEST_PROJECT_LOC));
  project.move(description,IResource.FORCE,null);
  project2=root.getProject(TEST_PROJECT2);
  project2.create(null);
  project2.open(null);
  gitDir2=new File(project2.getLocation().toFile().getAbsoluteFile(),Constants.DOT_GIT);
  repository2=FileRepositoryBuilder.create(gitDir2);
  repository2.create();
  RepositoryMapping mapping=new RepositoryMapping(project,gitDir);
  RepositoryMapping mapping2=new RepositoryMapping(project2,gitDir2);
  GitProjectData projectData=new GitProjectData(project);
  GitProjectData projectData2=new GitProjectData(project2);
  projectData.setRepositoryMappings(Collections.singletonList(mapping));
  projectData.store();
  projectData2.setRepositoryMappings(Collections.singletonList(mapping2));
  projectData2.store();
  GitProjectData.add(project,projectData);
  GitProjectData.add(project2,projectData2);
  RepositoryProvider.map(project,GitProvider.class.getName());
  RepositoryProvider.map(project2,GitProvider.class.getName());
  JGitTestUtil.write(new File(repository.getWorkTree(),TEST_PROJECT + "String_Node_Str" + TEST_FILE),"String_Node_Str");
  JGitTestUtil.write(new File(repository2.getWorkTree(),TEST_FILE2),"String_Node_Str");
  project.refreshLocal(IResource.DEPTH_INFINITE,null);
  project2.refreshLocal(IResource.DEPTH_INFINITE,null);
  git=new Git(repository);
  git.add().addFilepattern("String_Node_Str").call();
  git.commit().setMessage("String_Node_Str").call();
  git=new Git(repository2);
  git.add().addFilepattern("String_Node_Str").call();
  git.commit().setMessage("String_Node_Str").call();
  git.branchRename().setNewName("String_Node_Str").call();
}