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fix(lsp): add placeholder cancel function (#16189)

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Fixes a bug introduced by https://github.com/neovim/neovim/pull/15949

When no supported clients for a given method are available, buf_request
returns early with a nil value. If buf_request_sync is called on a
buffer with no clients that support a given method, the returned
`cancel` method (which is nil), is invoked, resulting in an error.

Solution: return an empty function handle
This commit is contained in:
Michael Lingelbach
2021-10-31 04:44:45 -07:00
committed by GitHub
parent 653d963293
commit 4da0351651
1 changed files with 1 additions and 1 deletions
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runtime/lua/vim/lsp.lua
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@@ -1317,7 +1317,7 @@ function lsp.buf_request(bufnr, method, params, handler)
if not tbl_isempty(all_buffer_active_clients[resolve_bufnr(bufnr)] or {}) and not method_supported then if not tbl_isempty(all_buffer_active_clients[resolve_bufnr(bufnr)] or {}) and not method_supported then
vim.notify(lsp._unsupported_method(method), vim.log.levels.ERROR) vim.notify(lsp._unsupported_method(method), vim.log.levels.ERROR)
vim.api.nvim_command("redraw") vim.api.nvim_command("redraw")
return return {}, function() end
end end
local client_request_ids = {} local client_request_ids = {}