pyo3_runtime.PanicException: assertion failed: self.is_char_boundary(new_len)

[maingoh]

This schema seem to raise a PanicException:

>>> Draft202012Validator({'type': 'string', 'pattern': 'aaaaaaaèaaéaaaaéè'})
thread '<unnamed>' panicked at /rustc/eeb90cda1969383f56a2637cbd3037bdf598841c/library/alloc/src/string.rs:1410:13:
assertion failed: self.is_char_boundary(new_len)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
pyo3_runtime.PanicException: assertion failed: self.is_char_boundary(new_len)

It seem more or less related to the accents/non-ascii chars but in some other configuration it works.

Not working:

Draft202012Validator({'type': 'string', 'pattern': 'èééaaaaaaaaaaaaaè'})

Working:

Draft202012Validator({'type': 'string', 'pattern': 'èééaè'})

[Stranger6667]

Thank you for reporting this! I am going to take a look at it today

[Stranger6667]

The cause is that I've put the limit in bytes rather than in characters on the schema representation inside __repr__. I wanted to drop it anyway as it is a performance foot gun (the whole schema is serialized to json first). Will issue a new release soon

[maingoh]

Thank you @Stranger6667 for the reactivity !

[Stranger6667]

Fixed in 0.25.1 (will be released as soon as the build is done)

You are very welcome :)

Please, don't hesitate to reach out if something won't work as expected with jsonschema :)