Keep previous compiler_refs

lib/next_ls/runtime.ex

@@ -164,7 +164,7 @@ defmodule NextLS.Runtime do
        %{
          name: name,
          working_dir: working_dir,
-         compiler_ref: nil,
+         compiler_refs: %{},
          port: port,
          task_supervisor: task_supervisor,
          logger: logger,
@@ -224,21 +224,21 @@ defmodule NextLS.Runtime do
         end
       end)
 
-    {:noreply, %{state | compiler_ref: %{task.ref => from}}}
+    {:noreply, %{state | compiler_refs: Map.put(state.compiler_refs, task.ref, from)}}
   end
 
   @impl GenServer
-  def handle_info({ref, errors}, %{compiler_ref: compiler_ref} = state) when is_map_key(compiler_ref, ref) do
+  def handle_info({ref, errors}, %{compiler_refs: compiler_refs} = state) when is_map_key(compiler_refs, ref) do
     Process.demonitor(ref, [:flush])
 
-    GenServer.reply(compiler_ref[ref], errors)
+    GenServer.reply(compiler_refs[ref], errors)
 
-    {:noreply, %{state | compiler_ref: nil}}
+    {:noreply, %{state | compiler_refs: Map.delete(compiler_refs, ref)}}
   end
 
-  def handle_info({:DOWN, ref, :process, _pid, _reason}, %{compiler_ref: compiler_ref} = state)
-      when is_map_key(compiler_ref, ref) do
-    {:noreply, %{state | compiler_ref: nil}}
+  def handle_info({:DOWN, ref, :process, _pid, _reason}, %{compiler_refs: compiler_refs} = state)
+      when is_map_key(compiler_refs, ref) do
+    {:noreply, %{state | compiler_refs: Map.delete(compiler_refs, ref)}}
   end
 
   def handle_info({:DOWN, _, :port, port, _}, %{port: port} = state) do