protobuf.lua:217: attempt to call local 'func'

[lilien1010]

I am using this lua binding module https://raw.githubusercontent.com/cloudwu/pbc/master/binding/lua53/protobuf.lua

but when I want to encode someting like this, it will show an error below

protobuf.lua:217: attempt to call local 'func'

proto 文件

 package lm;
 message test
 {
 	required int32 uid = 1;
 	required int32 param = 2;
 	optional string param1 = 3;
 	repeated string param2 = 4;
 };

local pbtt 			= 	require "lib.protobuf"    
local pb_file_chat 		=	"/proto/test.pb" 

pbtt.register_file (pb_file_chat) 

local pb1_decode 	=	pbtt.decode
local pb1_encode 	=	pbtt.encode
 
local data 		=	{ uid =1}
local pbf	,err	= pb1_encode('lm.test',data)

print( type(pbf))  -- nil 

[cloudwu]

It's ok here .

local data 		=	{ uid =1}
local pbf	,err	= pb1_encode('lm.test',data)

local dc = pb1_decode('lm.test', pbf)

print( type(pbf))  -- string
print(dc.uid) -- 1