Handle errors in server request

Author: Étienne Lévesque

apps/language_server/lib/language_server/server.ex

@@ -531,16 +531,10 @@ defmodule ElixirLS.LanguageServer.Server do
 
   defp handle_request(code_lens_req(_id, uri), state) do
     fun = fn ->
-      {:ok, spec_code_lens} =
-        if dialyzer_enabled?(state) and state.settings["suggestSpecs"] != false do
-          CodeLens.spec_code_lens(state.server_instance_id, uri, state.source_files[uri].text)
-        else
-          []
-        end
-
-      {:ok, test_code_lens} = CodeLens.test_code_lens(uri, state.source_files[uri].text)
-
-      {:ok, spec_code_lens ++ test_code_lens}
+      with {:ok, spec_code_lens} <- get_spec_code_lens(state, uri),
+           {:ok, test_code_lens} <- CodeLens.test_code_lens(uri, state.source_files[uri].text) do
+        {:ok, spec_code_lens ++ test_code_lens}
+      end
     end
 
     {:async, fun, state}
@@ -602,6 +596,14 @@ defmodule ElixirLS.LanguageServer.Server do
     }
   end
 
+  defp get_spec_code_lens(state, uri) do
+    if dialyzer_enabled?(state) and state.settings["suggestSpecs"] != false do
+      CodeLens.spec_code_lens(state.server_instance_id, uri, state.source_files[uri].text)
+    else
+      {:ok, []}
+    end
+  end
+
   # Build
 
   defp trigger_build(state) do