When the amount of data will be truncated

[vaptu]

Forgive my English is not good to use translation tools to submit. I use this library when problems occurred, as follows: String file exceeds a certain amount of time after a value is truncated, resulting in the original string becomes shorter. After the change of [https://github.com/qiniu/iconv] normal, because of the time the reason is not how many bytes of data the test will cause the above phenomenon

[djimenez]

Were you having problems with a reader or a writer? an example i could make a test case from would be appreciated.