segfault when lua binding

[Sookiep]

I tried using Lua binding Rocksdb to call the C API in Rocksdb:

lua binding code:
`LUALIB_API int lrocksdb_open(lua_State *L) {
lrocksdb_options_t *o = lrocksdb_get_options(L, 1);
const char *path = luaL_checkstring(L, 2);
char *err = NULL;
rocksdb_t *db = rocksdb_open(o->options, path, &err);

if(err) {
luaL_error(L, err);
free(err);
return 0;
}

lrocksdb_t *d = (lrocksdb_t *) lua_newuserdata(L, sizeof(lrocksdb_t));
d->db = db;
d->options = o;
d->open = 1;
lrocksdb_setmeta(L, "db");
return 1;
}`

lua code：
local rocksdb = require 'rocksdb' local opts = rocksdb.options({ create_if_missing = true }) local rocksdbTest = rocksdb.open(opts, "rocks.db")

The test found that segfault occurred when the program ran to “rocksdb_t *db = rocksdb_open(o->options, path, &err);”, causing the process to crash. But strangely, there are occasional cases where Rocksdb is successfully opened and data is written, and it is uncertain whether it is due to incorrect binding or a bug