From 501e858f679edecd4a38a86317ce50271014a80d Mon Sep 17 00:00:00 2001
From: tr3e <807596654@qq.com>
Date: Sun, 23 Sep 2018 01:36:01 +0800
Subject: [PATCH] Fix issue #742 (#745)

* Fix error comparison in SetTA

* Add testcase TestParseTA()
---
 scan_rr.go   |  6 +++---
 scan_test.go | 10 ++++++++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/scan_rr.go b/scan_rr.go
index e9556282..67f884b0 100644
--- a/scan_rr.go
+++ b/scan_rr.go
@@ -1665,9 +1665,9 @@ func setTA(h RR_Header, c chan lex, o, f string) (RR, *ParseError, string) {
 		return nil, &ParseError{f, "bad TA DigestType", l}, ""
 	}
 	rr.DigestType = uint8(i)
-	s, e, c1 := endingToString(c, "bad TA Digest", f)
-	if e != nil {
-		return nil, e.(*ParseError), c1
+	s, err, c1 := endingToString(c, "bad TA Digest", f)
+	if err != nil {
+		return nil, err, c1
 	}
 	rr.Digest = s
 	return rr, nil, c1
diff --git a/scan_test.go b/scan_test.go
index 88baa602..c4449d9b 100644
--- a/scan_test.go
+++ b/scan_test.go
@@ -79,3 +79,13 @@ func TestParseZoneInclude(t *testing.T) {
 		}
 	}
 }
+
+func TestParseTA(t *testing.T) {
+	rr, err := NewRR(` Ta 0 0 0`)
+	if err != nil {
+		t.Fatalf("expected no error, but got %s", err)
+	}
+	if rr == nil {
+		t.Fatal(`expected a normal RR, but got nil`)
+	}
+}