I need a JSON validator (grammar/syntax, not schema) or something, the JSON module unfortunately allows duplicate keys for input, what can you recommend?

I'm asking because RFC 4627 §2.2 is relaxed, but RFC 6902 §A.13. is restricted.

Example: I want 

   [
     { "op": "add", "path": "/baz", "value": "qux", "op": "remove" }
   ]

[download]
to throw an error.
to throw an error.

In reply to make duplicate JSON keys an error by daxim

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