Syntax error points to wrong position in json5

[plinnie]

When there is an error in a json5 file, the error message seems to always point to the first element in the json5 file.

For example:

import json5
JSON5 = """
{  
    version: "1.0",
    author: "John Smith",
    people : [
        "Monty",
        "Python"foo
    ]    
}
"""
json5.loads(JSON5)

Gives the error:

Traceback (most recent call last):
  File "C:/Users/Admin/surfdrive/client/stuff/tests/testjson5.py", line 12, in <module>
    json5.loads(JSON5)
  File "C:\Users\Admin\Anaconda3\envs\python38\lib\site-packages\json5\lib.py", line 82, in loads
    raise ValueError(err)
ValueError: <string>:3 Unexpected "v" at column 5

I would expect the error: ValueError: <string>:7 Unexpected "f" at column 16.

json5 version: 0.9.6
OS: Windows 10
Python: 3.8.8

[dpranke]

Yup, that looks like a bug, I'd expect the "f" as well. I'll take a look.

[dpranke]

Looks like this was introduced with the fix for issue #26, which was (partially) attempting to fix a different case where the position was misreported. I'll have to figure out some way to handle both cases ...

[thepackrat]

+1 on this one, just cost me some sanity-questioning until I figured out what the parser error was doing.

[dpranke]

This is fixed in beb97a9. I've just pushed v0.9.8, which contains this fix, to PyPI.

Sorry this took so long for a fix, there were $REASONS why I wasn't on top of this, plus once I started looking at it, the bug ended up being a rather subtle problem in the generated parsing code (i.e., in the parser generator).