commit https://github.com/vim/vim/commit/55fab439a6f3bba6dbe780ac034b84d5822a1a96 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 16:53:13 2016 +0100 patch 7.4.1278 Problem: When jsonencode() fails it still returns something. Solution: Return an empty string on failure.

/* json.c */
char_u *json_encode(typval_T *val);
char_u *json_encode_nr_expr(int nr, typval_T *val);
int json_decode_all(js_read_T *reader, typval_T *res);
int json_decode(js_read_T *reader, typval_T *res);
int json_find_end(js_read_T *reader);
/* vim: set ft=c : */