Fix ineffassign mistakes

src/cmds/restic/integration_test.go

@@ -559,7 +559,7 @@ func TestBackupExclude(t *testing.T) {
 
 		opts.Excludes = []string{"*.tar.gz", "private/secret"}
 		testRunBackup(t, []string{datadir}, opts, gopts)
-		snapshots, snapshotID = lastSnapshot(snapshots, loadSnapshotMap(t, gopts))
+		_, snapshotID = lastSnapshot(snapshots, loadSnapshotMap(t, gopts))
 		files = testRunLs(t, gopts, snapshotID)
 		Assert(t, !includes(files, filepath.Join(string(filepath.Separator), "testdata", "foo.tar.gz")),
 			"expected file %q not in first snapshot, but it's included", "foo.tar.gz")

src/restic/snapshot_filter_test.go

@@ -212,6 +212,10 @@ func TestApplyPolicy(t *testing.T) {
 
 		var want restic.Snapshots
 		err = json.Unmarshal(buf, &want)
+		if err != nil {
+			t.Errorf("error unmarshalling golden file %v: %v", goldenFilename, err)
+			continue
+		}
 
 		if !reflect.DeepEqual(keep, want) {
 			t.Errorf("test %v: wrong result, want:\n  %v\ngot:\n  %v", i, want, keep)