[R] Invalid buffer for empty characters with null data

[asfimport]

I'm hitting this from data coming from Spark while retrieving this data frame:

 

 

<database>   <name>    <temp>
default      a         TRUE
             b         TRUE

 

Error:

error: Failed to fetch data: invalid data in buffer 2

The problem is that is possible to have a NULL character array with offsets set to 0, notice that in the example above Spark returns two batches, so effectively, we are trying to parse:

 

<database>   <name>    <temp>
             b         TRUE

 

Where the data array is NULL and the offsets 0s for the columns.

Here is a snapshot while debugging StringArray_to_Vector:

Reporter: Javier Luraschi / @javierluraschi
Assignee: Romain Francois / @romainfrancois

Original Issue Attachments:

• Screen Shot 2018-11-02 at 10.27.11 PM.png

PRs and other links:

• GitHub Pull Request #2896
• GitHub Pull Request #2910

_{Note: This issue was originally created as ARROW-3693. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 2910
#2910