OpenWriter is failing after removing all entries

[pradeep-raja]

When I delete all entries and try to open the writer it is failing with the following errors
    error loading snapshot epoch: 18: error peeking snapshot format version 18: EOF from writer.go
    error opening index: existing snapshots found, but none could be loaded, exiting

This error is not happening If I leave at least one entry. 

config := bluge.DefaultConfig("index-data")
writer, err := bluge.OpenWriter(config)
if err != nil {
    log.Println(err)
    return
}

doc := bluge.NewDocument("a1")
doc.AddField(bluge.NewTextField("TestKey1", "TestKey Data1"))
if err = writer.Update(doc.ID(), doc); err != nil {
    log.Println(err)
    return
}

doc = bluge.NewDocument("a2")
doc.AddField(bluge.NewTextField("TestKey2", "TestKey Data2"))
if err = writer.Update(doc.ID(), doc); err != nil {
    log.Println(err)
    return
}

writer.Close()

writer, err = bluge.OpenWriter(config)
if err != nil {
    log.Println(err)
    return
}

if err = writer.Delete(bluge.Identifier("a1")); err != nil {
    log.Println(err)
    return
}

if writer.Delete(bluge.Identifier("a2")); err != nil {  // If I dont remove this second entry everything working fine
    log.Println(err)
    return
}

writer.Close()

writer, err = bluge.OpenWriter(config)
if err != nil {
    log.Println(err) 
    return
}
writer.Close()