Numbers with extra prefix 0 should not be accepted as valid input

[MichaelSuen-thePointer]

What did you do?

ujson.loads("0012")

What did you expect to happen?

exception raised, ValueError for example

What actually happened?

function returns 12

What versions are you using?

• OS: Debian 10
• Python: 3.7.3
• UltraJSON: 5.7.0

Please include code that reproduces the issue.

The best reproductions are self-contained scripts with minimal dependencies.

try:
    ujson.loads("0012")
    print("not ok")
except ValueError:
    print("ok")

[bwoodsend]

The JSON spec explicitly allows parsers to accept input that isn't part of the spec but whose intention is clear and non ambiguous.

Beyond purism, why does this actually matter?

[MichaelSuen-thePointer]

The JSON spec explicitly allows parsers to accept input that isn't part of the spec but whose intention is clear and non ambiguous.

Beyond purism, why does this actually matter?

I was porting code from python standard json to ujson for better performance, and the code relies on loads("0012") to fail.

[bwoodsend]

You're probably better off going with orjson then. They take the opposite stance to us on accepting non standard inputs.