attempt to index local 'signature_help' (a nil value)

[xsh005]

Repro:

vim.iter({1,2,3}):to
-- gets totable()
-- press <C-y>

Error:

Error executing vim.schedule lua callback: ...ons/nvim-linux64/share/nvim/runtime/lua/vim/lsp/util.lua:835: attempt to index loc
al 'signature_help' (a nil value)                                                                                               
stack traceback:                                                                                                                
        ...ons/nvim-linux64/share/nvim/runtime/lua/vim/lsp/util.lua:835: in function 'convert_signature_help_to_markdown_lines' 
        ...ou/.local/share/nvim-main/lazy/epo.nvim/lua/epo/init.lua:108: in function 'handler'                                  
        ...ications/nvim-linux64/share/nvim/runtime/lua/vim/lsp.lua:1517: in function ''                                        
        vim/_editor.lua: in function <vim/_editor.lua:0>  

[xsh005]

Maybe we need a pcall here?