validator occur coredump in centos 7 about lua-rapidjson

[zengjinji]

i am not good at c++, could you help see it?

[membphis]

please take a look at this: https://github.com/iresty/apisix/blob/master/lua/apisix/core/schema.lua#L18

it works fine at my side.

[zengjinji]

I see it and changed my way of using it. it can not occur coredump, thanks a lot ！ @membphis

[zengjinji]

But I still don't understand why occur coredump.
According to my understanding, occur coredump means code has bug. If it doesn't work correctly, it need to return the error instead of occur coredump

using like it, it work well

function _M.content()
    local waf_sd = rapidjson.SchemaDocument(waf_checker)
    local waf_validator = rapidjson.SchemaValidator(waf_sd)
    local t = rapidjson.decode(str);
    local d = rapidjson.Document(t)
    waf_validator:validate(d)
end

but using like it, it occur coredump in centos7 and work find in centos6, I do this because I just want to initialize SchemaValidator once

local waf_sd = rapidjson.SchemaDocument(waf_checker)
local waf_validator = rapidjson.SchemaValidator(waf_sd)

function _M.content()
    local t = rapidjson.decode(str);
    local d = rapidjson.Document(t)
    waf_validator:validate(d)
end