diff -dupr a/jv_parse.c b/jv_parse.c --- a/jv_parse.c 2015-07-26 16:32:03.000000000 -0700 +++ b/jv_parse.c 2017-06-07 10:06:28.040912855 -0700 @@ -383,7 +383,7 @@ static pfunc stream_token(struct jv_pars static void tokenadd(struct jv_parser* p, char c) { assert(p->tokenpos <= p->tokenlen); - if (p->tokenpos == p->tokenlen) { + if (p->tokenpos >= (p->tokenlen - 1)) { p->tokenlen = p->tokenlen*2 + 256; p->tokenbuf = jv_mem_realloc(p->tokenbuf, p->tokenlen); } @@ -485,7 +485,7 @@ static pfunc check_literal(struct jv_par TRY(value(p, v)); } else { // FIXME: better parser - p->tokenbuf[p->tokenpos] = 0; // FIXME: invalid + p->tokenbuf[p->tokenpos] = 0; char* end = 0; double d = jvp_strtod(&p->dtoa, p->tokenbuf, &end); if (end == 0 || *end != 0)