Invalid query JSON makes the binary SIGABORT

[Cubox]

Hi,

I sent an invalid json while trying to use scoutfish, and the binary received a SIGABRT. It happened in the json parsing code, the libc throws an exception due to incorrect token or something
frame #8: 0x0000000000291eaf scoutfishScout::parse_query(data=0x00007fffffffd900, is=0x00007fffffffdc80) at scout.cpp:634:12
631
632 */
633
-> 634 json j = json::parse(is);`

Tested string is ../scoutfish/src/scoutfish scout test.scout "{ "sub-fen": "8/8/p7/8/8/1B3N2/8/8" }"