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1. the initial indent can't be longer than the recursion limit
Exception type: parser.runtime,
Source: string,
Comment: call canceled - endless json recursion detected
2. distinct[all]: numbering goes on from the last number, every object has its own, numbered keys of the data are skipped
{ "a":1, "a_2":2, "o":{ "a":3, "a_2":4, "a_3":5 }, "a_3":6, "a_2_2":7, "a_4":8 }
{ "a":1, "a_3":0, "a_2":2, "a_4":3, "a_5":4 }
[ { "a":1, "a_2":2 }, { "a":3, "a_2":4 } ]
3. and it is not quadratic
5001 keys, last a_5000: 5000, z: 0
4. negative depth is no limit
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