Port, board and/or hardware

ESP32

MicroPython version

MicroPython v1.26.1 on 2025-09-11; Generic ESP32 module with SPIRAM with ESP32
Type "help()" for more information.

Reproduction

MicroPython v1.26.1 on 2025-09-11; Generic ESP32 module with SPIRAM with ESP32
Type "help()" for more information.

import json
print(json.loads('{"a": }')) # {} — key gone, no error
print(json.loads('{"a": 1 "b": 2}')) # {'a': 1, 'b': 2}
print(json.loads('{"a": 01}')) # {'a': 1}
print(json.loads('{"a": 1,}')) # {'a': 1}
{}
{'a': 1, 'b': 2}
{'a': 1}
{'a': 1}

Expected behaviour

CPython rejects all tests

Observed behaviour

CPython rejects all tests

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree