Segfault with output --formated

[Bang Pham Huu]

rasql -q 'select encode(c, "csv") from test_rgb as c' --out formatted
rasql: rasdaman query tool v1.0, rasdaman v9.5.0-beta1-g83e5ca18.
opening database RASBASE at localhost:7001...ok
Executing retrieval query...ok
Query result collection has 1 element(s):
  Result object 1:
 [WARN] -  dummy implementation 
 [INFO] - Segmentation fault caught, stacktrace:


Segmentation fault caught, stacktrace:
 [INFO] - [bt]: (1) rasql (??:0) - printScalar(r_Scalar const&)+0x2d [0x6267f3]
[bt]: (1) rasql (??:0) - printScalar(r_Scalar const&)+0x2d [0x6267f3]
 [INFO] - [bt]: (2) rasql (??:0) - printResult()+0x743 [0x627452]
[bt]: (2) rasql (??:0) - printResult()+0x743 [0x627452]
 [INFO] - [bt]: (3) rasql (??:0) - doStuff(int, char**)+0xf9e [0x629d3f]
[bt]: (3) rasql (??:0) - doStuff(int, char**)+0xf9e [0x629d3f]
 [INFO] - [bt]: (4) rasql (rasql.cc:543) - main+0x193 [0x62a3cc]
[bt]: (4) rasql (rasql.cc:543) - (null)+0x193 [0x62a3cc]
 [INFO] - [bt]: (5) /lib64/libc.so.6 (??:0) - __libc_start_main+0xf5 [0x7f716cc8ec05]
[bt]: (5) /lib64/libc.so.6 (??:0) - (null)+0xf5 [0x7f716cc8ec05]
 [INFO] - [bt]: (6) rasql() [0x624e27]
[bt]: (6) rasql() [0x624e27]
pure virtual method called
terminate called without an active exception
Aborted (core dumped)