Duplicated (field and function) completion items for recursively called functions in module

[smackesey]

Describe the bug

Both a field and a function completion item are generated for functions that are called recursively in a module. Only a function item should be generated.

To Reproduce
Steps to reproduce the behavior:

Create this module:

# test.lua
local m = {}

function m.myfunc(n)
  print(n)
  if n == 1 then return
  else m.myfunc(n-1)
  end
end

function m.myotherfunc(n)
  print(n)
end

return m

Then require it in another module and look at the provided completions:

# test_other.lua

local test = require('test')

test. -- cursor here

I get three completion items from test (text representation here is from coc, but that's incidental):

• myfunc~ m [LS]
• myfunc(n)~ S [LS]
• myotherfunc(n)~ S [LS]

Expected behavior

The first completion item should not show up.

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• OS: macOS big sur
• Is WSL remote?
• Client: Neovim 0.5