Program: 91367
Project: 91367
Buggy source:
public void tryRenameWhenLocked(String toLock,String fromName,String toName,String headPointsTo) throws IOException {
  writeSymref(Constants.HEAD,headPointsTo);
  ObjectId oldfromId=db.resolve(fromName);
  ObjectId oldHeadId=db.resolve(Constants.HEAD);
  writeReflog(db,oldfromId,oldfromId,"String_Node_Str",fromName);
  List<org.eclipse.jgit.storage.file.ReflogReader.Entry> oldFromLog=db.getReflogReader(fromName).getReverseEntries();
  List<org.eclipse.jgit.storage.file.ReflogReader.Entry> oldHeadLog=oldHeadId != null ? db.getReflogReader(Constants.HEAD).getReverseEntries() : null;
  assertTrue("String_Node_Str",new File(db.getDirectory(),"String_Node_Str" + fromName).exists());
  LockFile lockFile=new LockFile(new File(db.getDirectory(),toLock));
  try {
    assertTrue(lockFile.lock());
    RefRename renameRef=db.renameRef(fromName,toName);
    Result result=renameRef.rename();
    assertEquals(Result.LOCK_FAILURE,result);
    assertExists(false,toName);
    if (!toLock.equals(toName))     assertExists(false,toName + "String_Node_Str");
    assertExists(true,toLock + "String_Node_Str");
    if (!toLock.equals(fromName))     assertExists(false,"String_Node_Str" + fromName + "String_Node_Str");
    assertExists(false,"String_Node_Str" + toName + "String_Node_Str");
    assertEquals(oldHeadId,db.resolve(Constants.HEAD));
    assertEquals(oldfromId,db.resolve(fromName));
    assertNull(db.resolve(toName));
    assertEquals(oldFromLog.toString(),db.getReflogReader(fromName).getReverseEntries().toString());
    if (oldHeadId != null)     assertEquals(oldHeadLog.toString(),db.getReflogReader(Constants.HEAD).getReverseEntries().toString());
  }
  finally {
    lockFile.unlock();
  }
}

Fixed version (ground truth):
public void tryRenameWhenLocked(String toLock,String fromName,String toName,String headPointsTo) throws IOException {
  writeSymref(Constants.HEAD,headPointsTo);
  ObjectId oldfromId=db.resolve(fromName);
  ObjectId oldHeadId=db.resolve(Constants.HEAD);
  writeReflog(db,oldfromId,oldfromId,"String_Node_Str",fromName);
  List<org.eclipse.jgit.storage.file.ReflogReader.Entry> oldFromLog=db.getReflogReader(fromName).getReverseEntries();
  List<org.eclipse.jgit.storage.file.ReflogReader.Entry> oldHeadLog=oldHeadId != null ? db.getReflogReader(Constants.HEAD).getReverseEntries() : null;
  assertTrue("String_Node_Str",new File(db.getDirectory(),"String_Node_Str" + fromName).exists());
  LockFile lockFile=new LockFile(new File(db.getDirectory(),toLock),db.getFS());
  try {
    assertTrue(lockFile.lock());
    RefRename renameRef=db.renameRef(fromName,toName);
    Result result=renameRef.rename();
    assertEquals(Result.LOCK_FAILURE,result);
    assertExists(false,toName);
    if (!toLock.equals(toName))     assertExists(false,toName + "String_Node_Str");
    assertExists(true,toLock + "String_Node_Str");
    if (!toLock.equals(fromName))     assertExists(false,"String_Node_Str" + fromName + "String_Node_Str");
    assertExists(false,"String_Node_Str" + toName + "String_Node_Str");
    assertEquals(oldHeadId,db.resolve(Constants.HEAD));
    assertEquals(oldfromId,db.resolve(fromName));
    assertNull(db.resolve(toName));
    assertEquals(oldFromLog.toString(),db.getReflogReader(fromName).getReverseEntries().toString());
    if (oldHeadId != null)     assertEquals(oldHeadLog.toString(),db.getReflogReader(Constants.HEAD).getReverseEntries().toString());
  }
  finally {
    lockFile.unlock();
  }
}