How do debug issues on save? Lua only formats once or twice on save, and then it stops working

[synic]

I've got none-ls configured to format lua files on save using stylua. I've also got it configured to format other types of files (go, python, typescript) and those work just fine.

For lua files, it works once or twice, and then I start seeing this in the logs:

[TRACE Tue Jan 30 14:28:35 2024] /Users/synic/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method textDocument/didChange
[TRACE Tue Jan 30 14:28:35 2024] /Users/synic/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/generators.lua:21: running generators for method NULL_LS_DIAGNOSTICS
[DEBUG Tue Jan 30 14:28:35 2024] /Users/synic/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/generators.lua:24: no generators available

If I run :lua vim.lsp.buf.format(), it formats just fine. This doesn't happen with any other file type.

I am unable to reproduce with the minimal config, but I'm not sure what is the problem in my own config. Where can I go from here to find out?

[synic]

Just some more information. I was looking through the source code trying to find the problem. It seems that get_available will only return generators that are not flagged as "failed".

However, it looks like a syntax error can cause a generator to be failed, which doesn't seem right:

[TRACE Tue Jan 30 14:07:08 2024] plugins/none-ls.nvim/lua/null-ls/helpers/generator_factory.lua:207: error output: error: could not format from stdin: failed to format from stdin: error parsing: error occurred while creating ast: unexpected token `fasfd`. (starting from line 3, character 1 and ending on line 3, character 6)
                log:warn("failed to run generator: " .. results)
                generator._failed = true
                log:warn("failed to run generator: " .. results)
                generator._failed = true

[synic]

This was a red herring, ignore.

[synic]

Ok, I've tracked the problem down to lazy.nvim's change detection.

I noticed that autoformat would stop working, but ONLY if the lua file was a module being monitored by lazy.nvim. Whatever lazy is doing to monitor the files it causes the autocmd created by none-ls to be cleared out after the file is changed.