Github user CHOIJAEHONG1 commented on the pull request:
https://github.com/apache/spark/pull/7494#issuecomment-122866982
@sun-rui
I reproduced the same error as the testcase's with
```
$) export LC_ALL=C
$) ./run-tests.sh
```
It needs to call rawToChar(), R gives an error message below otherwise.
```
functions on binary files : Error in `Encoding<-`(`*tmp*`, value = "UTF-8")
:
a character vector argument expected
Calls: test_package ... readTypedObject -> getJobj -> jobj -> readString ->
Encoding<-
```
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