happyleavesaoc/aoc-mgz

ConstError: expected b'\x00\x0b' but parsed b'\x00\x00' -> expected 3 to 3, found 0

Namek opened this issue · 4 comments

Namek commented 
Traceback (most recent call last):
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 2784, in _parse
    return self.subcon._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 295, in _parse
    return self.subcon._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 1594, in _parse
    obj = self.cases.get(key, self.default)._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 1936, in _parse
    raise ConstError("expected %r but parsed %r" % (self.value, obj))
construct.core.ConstError: expected b'\x00\x0b' but parsed b'\x00\x00'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 1042, in _parse
    obj.append(self.subcon._parse(stream, context._, path))
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 2788, in _parse
    raise e.__class__("%s\n    %s" % (e, path))
construct.core.ConstError: expected b'\x00\x0b' but parsed b'\x00\x00'
    (parsing) -> initial -> players

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 2784, in _parse
    return self.subcon._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 1050, in _parse
    raise RangeError("expected %d to %d, found %d" % (min, max, len(obj)))
construct.core.RangeError: expected 3 to 3, found 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\dev\ant_league\backend\lib\site-packages\mgz\summary\__init__.py", line 73, in __init__
    self._header = mgz.header.parse_stream(self._handle)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 171, in parse_stream
    return self._parse(stream, context2, "(parsing)")
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 295, in _parse
    return self.subcon._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 295, in _parse
    return self.subcon._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\mgz\util.py", line 57, in _parse
    return self.subcon._parse(new_stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 357, in _parse
    return self.subcon.parse(data, context)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 158, in parse
    return self.parse_stream(BytesIO(data), context, **kw)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 171, in parse_stream
    return self._parse(stream, context2, "(parsing)")
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "C:\dev\ant_league\backend\lib\site-packages\construct\core.py", line 2788, in _parse
    raise e.__class__("%s\n    %s" % (e, path))
construct.core.RangeError: expected 3 to 3, found 0
    (parsing) -> initial

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\dev\ant_league\backend\lib\site-packages\bottle.py", line 868, in _handle
    return route.call(**args)
  File "C:\dev\ant_league\backend\lib\site-packages\bottle.py", line 1748, in wrapper
    rv = callback(*a, **ka)
  File "C:\dev\ant_league\backend\lib\site-packages\bottle_sqlite.py", line 141, in wrapper
    rv = callback(*args, **kwargs)
  File "C:\dev\ant_league\backend\website.py", line 164, in post_match
    match_info = get_match_info(file.file)
  File "C:\dev\ant_league\backend\website.py", line 48, in get_match_info
    s = Summary(data)
  File "C:\dev\ant_league\backend\lib\site-packages\mgz\summary\__init__.py", line 85, in __init__
    raise RuntimeError("invalid mgz file: {}".format(e))
RuntimeError: invalid mgz file: expected 3 to 3, found 0
    (parsing) -> initial

replay.zip

gethvi commented

I also encountered this error while trying to get the Summary of a game. I managed to track the problem down to this line:

aoc-mgz/mgz/header/initial.py

Line 64 in f59d3a4

Const(b'\x00\x0b'),

Changing it to Const(b'\x00\x00') didn't help. I replaced it with Bytes(2) and it worked.

triplejberger commented

I get a similar issue when trying to run the example code from the ReadMe

  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 2784, in _parse
    return self.subcon._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 1936, in _parse
    raise ConstError("expected %r but parsed %r" % (self.value, obj))
construct.core.ConstError: expected b'`\n' but parsed b'\x00`'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "main.py", line 29, in <module>
    header.parse_stream(data)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 171, in parse_stream
    return self._parse(stream, context2, "(parsing)")
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 295, in _parse
    return self.subcon._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 295, in _parse
    return self.subcon._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/mgz/util.py", line 57, in _parse
    return self.subcon._parse(new_stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 357, in _parse
    return self.subcon.parse(data, context)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 158, in parse
    return self.parse_stream(BytesIO(data), context, **kw)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 171, in parse_stream
    return self._parse(stream, context2, "(parsing)")
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 867, in _parse
    subobj = sc._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 2784, in _parse
    return self.subcon._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 1594, in _parse
    obj = self.cases.get(key, self.default)._parse(stream, context, path)
  File "/Users/user/Library/Python/3.8/lib/python/site-packages/construct/core.py", line 2788, in _parse
    raise e.__class__("%s\n    %s" % (e, path))
construct.core.ConstError: expected b'`\n' but parsed b'\x00`'
    (parsing) -> de -> de
happyleavesaoc commented

@Namek I looked at that rec, not yet sure what the problem is. In the meantime, you can use the fast parser, which seems to work fine on that rec.

@triplejberger can you provide your rec please?

  • 👍1
happyleavesaoc commented

Closing since this issue manifested on older recs. Please open a new issue if anyone has a specific usecase and needs a fix.

  • 👍1