Fixed some ineffective assignments (#12543)

config/file_test.go

@@ -198,6 +198,7 @@ func TestFileStoreGet(t *testing.T) {
 
 	newCfg := &model.Config{}
 	oldCfg, err := fs.Set(newCfg)
+	require.NoError(t, err)
 
 	assert.True(t, oldCfg == cfg, "returned config after set() changed original")
 	assert.False(t, newCfg == cfg, "returned config should have been different from original")

config/migrate.go

@@ -42,6 +42,9 @@ func migrateFile(name string, source Store, destination Store) error {
 
 	if fileExists {
 		file, err := source.GetFile(name)
+		if err != nil {
+			return errors.Wrapf(err, "failed to migrate %s", name)
+		}
 		err = destination.SetFile(name, file)
 		if err != nil {
 			return errors.Wrapf(err, "failed to migrate %s", name)