output_format=terse,json core dumping

[Kurt Dorsey <Kurt_Dorsey@Dell.com>]

I am trying to get multiple output formats working with fio and I am 
getting a core dump 
fio: diskutil.c:710: show_disk_util: Assertion `parent' failed.
Aborted (core dumped)

I am utilizing format from 
commit a666cab8ed3d2a2fa782be345425a2e88734a007
Author: Jens Axboe <axboe@fb.com>
Date:   Tue Oct 27 13:45:21 2015 +0900

    Enable the use of multiple output formats
    
    You can now do
    
    ./fio --output-format=normal,json jobfile.fio
    
    and get both types of output.
    
    Signed-off-by: Jens Axboe <axboe@fb.com>


fio -v
fio-2.6-10-g820b



fio --ioengine=libaio --buffered=0 --direct=1 --norandommap --name=test  
--filename=/dev/sdb --iodepth=32  --ba=4k --rw=randrw --rwmixwrite=65 --
bs=8K --numjobs=1 --runtime=10 --ramp_time=0 --time_based --output-
format=terse,json

I have also tried 
--format=normal,json and I get the same issue


--output-format=normal,terse  
Works just fine but I really would like to have json output along with 
terse.


Is there a workaround to get both terse and json (or json+)?
Thank you,
Kurt