Pre 1.13 to 1.13+ world does not work

[ShibeTemple]

Issue is present with handling of NBT data within OldBlock class. Possibly need to create a new-block-object with the same properties (referenced from OldBlock object) instead of just referencing the same object. <-- within core loop of negative.py.

This issue could be solved with some brain time but it comes with larger issues behind the current anvil parser. Will keep issue open for documentation purposes, however re-write of anvil parser will take priority in work-time.

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ALL ARGUMENTS:  ['negative.py', 'Pre', 'Post', 'new', 'output', '-t', '12']
ARGUMENTS:  ['-t', '12']
pre: Pre post: Post new: new output: output
wd: A:\!\M\Minecraft Negative\aaron test 1
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Thread count set to (12)
REGION[ -01 000 ] new thread
REGION[ 000 000 ] new thread
REGION[ -01 000 ] region file exists in all
REGION[ 000 000 ] region file exists in all
Traceback (most recent call last):
  File "A:\!\M\Minecraft Negative\aaron test 1\negative.py", line 260, in <module>
    threading_results = pool.starmap(process_region, zip(filelist, itertools.repeat(wd_pre_region), itertools.repeat(wd_post_region), itertools.repeat(wd_new_region), itertools.repeat(wd_output_region), itertools.repeat(include_bedrock)))
  File "C:\Users\bjg15\AppData\Local\Programs\Python\Python39\lib\multiprocessing\pool.py", line 372, in starmap
    return self._map_async(func, iterable, starmapstar, chunksize).get()
  File "C:\Users\bjg15\AppData\Local\Programs\Python\Python39\lib\multiprocessing\pool.py", line 771, in get
    raise self._value
  File "C:\Users\bjg15\AppData\Local\Programs\Python\Python39\lib\multiprocessing\pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "C:\Users\bjg15\AppData\Local\Programs\Python\Python39\lib\multiprocessing\pool.py", line 51, in starmapstar
    return list(itertools.starmap(args[0], args[1]))
  File "A:\!\M\Minecraft Negative\aaron test 1\negative.py", line 234, in process_region
    output_region.save(file_to_save)
  File "A:\!\M\Minecraft Negative\aaron test 1\anvil\empty_region.py", line 218, in save
    nbt_data = chunk.save()
  File "A:\!\M\Minecraft Negative\aaron test 1\anvil\empty_chunk.py", line 161, in save
    sections.tags.append(s.save())
  File "A:\!\M\Minecraft Negative\aaron test 1\anvil\empty_section.py", line 152, in save
    tag.tags.append(nbt.TAG_String(name='Name', value=block.name()))
AttributeError: 'OldBlock' object has no attribute 'name'