Made text/json/parser.cpp exception safe.
Made text/json/parser.cpp exception safe.

retrieva/pficommon,retrieva/pficommon,takei-yuya/pficommon,pfi/pficommon,takei-yuya/pficommon,takei-yuya/pficommon,pfi/pficommon,takei-yuya/pficommon,retrieva/pficommon,retrieva/pficommon,retrieva/pficommon,pfi/pficommon,pfi/pficommon