JSON parser test failures

[lod]

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A JSON test suite has been produced which tests most commonly available JSON parsers against JSON corner cases http://seriot.ch/parsing_json.php https://github.com/nst/JSONTestSuite

These two test files are reported as causing the parser to crash. https://github.com/nst/JSONTestSuite/blob/master/test_parsing/n_structure_100000_opening_arrays.json https://github.com/nst/JSONTestSuite/blob/master/test_parsing/n_structure_open_array_object.json

These two test files are reported as being incorrectly parsed. https://github.com/nst/JSONTestSuite/blob/master/test_parsing/y_object_escaped_null_in_key.json https://github.com/nst/JSONTestSuite/blob/master/test_parsing/y_string_null_escape.json

I have not yet personally tested any of the tests.

[lod]

The two test files reported as incorrectly parsed are due to the presence of null characters.

Not supporting these seems to be a deliberate decision, presumably as doing otherwise would interfere with the standard string structure and be a pain to manage and use.

Explicitly documenting this variation from the standard would probably be worthwhile however.