close rpc sessions properly

client/src/components/Infoview.tsx

@@ -25,7 +25,7 @@ function Infoview({ editor, editorApi, leanClient } : {editor: monaco.editor.ISt
   const [globalDiagnostics, setGlobalDiagnostics] = useState<any[]>(undefined)
 
   const [uri, setUri] = useState<string>()
-  console.log(rpcSession)
+
   const fetchInteractiveGoals = () => {
     if (editor && rpcSession) {
       const pos = toLanguageServerPosition(editor.getPosition())
@@ -84,6 +84,7 @@ function Infoview({ editor, editorApi, leanClient } : {editor: monaco.editor.ISt
       checkCompleted()
       const t = editor.onDidChangeModel((ev) => {
         if (ev.newModelUrl) {
+          editorApi.closeRpcSession(rpcSession)
           setRpcSession(undefined)
           setUri(ev.newModelUrl.toString())
           editorApi.createRpcSession(ev.newModelUrl.toString()).then((rpcSession) => {