Ensure server doesn't panic

gocode_test.go

@@ -74,7 +74,7 @@ func runClients(t *testing.T, serverAddr string) {
 
 	// start bunch of clients
 	for i := 0; i < 10; i++ {
-		offset := i * 10
+		offset := i * 5
 		clientGroup.Go(func() error {
 			cmd := exec.CommandContext(clientCtx, "gocode",
 				"-sock", "tcp",
@@ -90,7 +90,7 @@ func runClients(t *testing.T, serverAddr string) {
 	}
 
 	// wait for a bit
-	time.Sleep(150 * time.Millisecond)
+	time.Sleep(300 * time.Millisecond)
 
 	// cancel all clients
 	clientCancel()

server.go

@@ -102,13 +102,16 @@ func (s *Server) AutoComplete(ctx context.Context, req *AutoCompleteRequest, res
 		var buf bytes.Buffer
 		log.Printf("Got autocompletion request for '%s'\n", req.Filename)
 		log.Printf("Cursor at: %d\n", req.Cursor)
-		buf.WriteString("-------------------------------------------------------\n")
-		buf.Write(req.Data[:req.Cursor])
-		buf.WriteString("#")
-		buf.Write(req.Data[req.Cursor:])
-		log.Print(buf.String())
-		log.Println("-------------------------------------------------------")
+		if len(req.Data) > req.Cursor {
+			buf.WriteString("-------------------------------------------------------\n")
+			buf.Write(req.Data[:req.Cursor])
+			buf.WriteString("#")
+			buf.Write(req.Data[req.Cursor:])
+			log.Print(buf.String())
+			log.Println("-------------------------------------------------------")
+		}
 	}
+
 	now := time.Now()
 	cfg := suggest.Config{
 		RequestContext:     ctx,