fix(lsp): don't try to delete user command if it doesn't exist

CHANGELOG.md

@@ -6,6 +6,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- LSP: Don't try to delete `RustLsp` command on client exit
+  if it doesn't exist.
+
 ## [4.10.2] - 2024-03-01
 
 ### Fixed

lua/rustaceanvim/commands/init.lua

@@ -320,7 +320,9 @@ end
 
 --- Delete the `:RustLsp` command
 function M.delete_rust_lsp_command()
-  vim.api.nvim_del_user_command(rust_lsp_cmd_name)
+  if vim.cmd[rust_lsp_cmd_name] then
+    vim.api.nvim_del_user_command(rust_lsp_cmd_name)
+  end
 end
 
 ---Create the `:Rustc` command