[Lua] - Local scoped variables not cleared

Runtime Framework
,
1

It seams that local scoped variables are not being correctly gc-ed when they are not longer used, thus memory just keeps growing.
Example:
When using stock/vanilla Lua 5.1 following code yields this:

local d = {}
do
    local a = {}
	local b = 1
    d['a'] = a
    d['b'] = b
end

for k, v in pairs(d) do
    print(k, v)
end
collectgarbage()
print("=====================")
for k, v in pairs(d) do
    print(k, v)
end

a	table: 0x006b8638
b	1
=====================
b	1

While in docker the same code does not release the local scoped variable and yields this.

2023-05-24 11:58:13 a   table: 0xc0012a4000
2023-05-24 11:58:13 b   1
2023-05-24 11:58:13 =====================
2023-05-24 11:58:13 a   table: 0xc0012a4000
2023-05-24 11:58:13 b   1

I managed to track same issue in gopher-lua it was fixed but same changes i haven’t seen in nakama pull.
Local Memory Scope GC

collecgarbage is implemented in nakama, and it clears whole memory of Go rather than just Lua VMs

So i am not 100% sure , should in nakama case locally scoped variables be gc-ed or not, but anyway reporting it for clarification.

  1. Versions: Nakama {3.16.0}, { Docker},
  2. Server Framework Runtime: Lua
2

Hi @Eatos,

Please could you file an issue on our Nakama GitHub Issue Tracker and we will investigate.