live_grep results are not removed by a garbage collector

[dembitskyi]

Description

Neovim does not release live_grep results memory.
An activity monitor (e.g. htop) shows that nvim keeps 'live_grep' results forever. Sometimes it releases 50%, but it never goes to 5%. This makes the telescope plugin unusable if you need to work with a project that has a codebase like android or bigger.

I tried invoking lua collectgarbage("collect") multiple times, but it did not help.

Neovim version

NVIM v0.8.1
Build type: Release
LuaJIT 2.1.0-beta3

Operating system and version

Pop!_OS 22.04 LTS

Telescope version / branch / rev

203bf56

checkhealth telescope

telescope: require("telescope.health").check()
========================================================================
## Checking for required plugins
  - OK: plenary installed.
  - WARNING: nvim-treesitter not found. 

## Checking external dependencies
  - OK: rg: found ripgrep 13.0.0
  - OK: fd: found fd 8.3.1

## ===== Installed extensions =====

Steps to reproduce

1. cd $HOME/android
2. nvim -nu /tmp/minimal.lua
3. Telescope live_grep
   3.1. type "l" and wait 5 minutes
   3.2. close the live_grep window
4. Open Telescope planets and close it - this should release cached pickers
5. repeat "3 - 4 steps" 5 times
6. lua collectgarbage("collect")
7. check nvim memory usage

Expected behavior

Nvim uses ~1GB of RAM or less.

Actual behavior

Nvim will consume 50GB of RAM after just 10 live_grep attempts :(
Recovery: reopen nvim

Minimal config

vim.cmd [[set runtimepath=$VIMRUNTIME]]
vim.cmd [[set packpath=/tmp/nvim/site]]
local package_root = '/tmp/nvim/site/pack'
local install_path = package_root .. '/packer/start/packer.nvim'
local function load_plugins()
  require('packer').startup {
    {
      'wbthomason/packer.nvim',
      {
        'nvim-telescope/telescope.nvim',
        requires = {
          'nvim-lua/plenary.nvim',
          { 'nvim-telescope/telescope-fzf-native.nvim', run = 'make' },
        },
      },
      -- ADD PLUGINS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE
    },
    config = {
      package_root = package_root,
      compile_path = install_path .. '/plugin/packer_compiled.lua',
      display = { non_interactive = true },
    },
  }
end
_G.load_config = function()
  require('telescope').setup()
  -- ADD INIT.LUA SETTINGS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE
end
if vim.fn.isdirectory(install_path) == 0 then
  print("Installing Telescope and dependencies.")
  vim.fn.system { 'git', 'clone', '--depth=1', 'https://github.com/wbthomason/packer.nvim', install_path }
end
load_plugins()
require('packer').sync()

[SonTrinhEH]

I currently face the same issue, I'm not able to do the live grep to search things in my project

[jamestrew]

I've tried to replicate this with the linux source code, but I don't see a significant increase in memory usage over time.

Nvim uses ~1GB of RAM or less.

This is pretty much my experience.
This is on arch linux, nightly neovim and telescope.

[jamestrew]

Try this out: #2482 (comment)
I think this issue is relate to changes in the default vimgrep args.
I've created a PR for this already #2488