From 519725bb3c075ee2462c929f5997cb068e18466a Mon Sep 17 00:00:00 2001
From: Ondřej Surý <ondrej@sury.org>
Date: Mon, 26 Mar 2012 16:50:58 +0200
Subject: Imported Upstream version 2012.03.22

---
 src/pkg/encoding/gob/decode.go         |  3 +++
 src/pkg/encoding/gob/doc.go            |  2 +-
 src/pkg/encoding/gob/encoder_test.go   |  4 ++--
 src/pkg/encoding/gob/gobencdec_test.go | 19 +++++++++++++++++++
 4 files changed, 25 insertions(+), 3 deletions(-)

(limited to 'src/pkg/encoding/gob')

diff --git a/src/pkg/encoding/gob/decode.go b/src/pkg/encoding/gob/decode.go
index 0708a83c9..e32a178ab 100644
--- a/src/pkg/encoding/gob/decode.go
+++ b/src/pkg/encoding/gob/decode.go
@@ -707,6 +707,9 @@ func (dec *Decoder) decodeInterface(ityp reflect.Type, state *decoderState, p ui
 	if name == "" {
 		// Copy the representation of the nil interface value to the target.
 		// This is horribly unsafe and special.
+		if indir > 0 {
+			p = allocate(ityp, p, 1) // All but the last level has been allocated by dec.Indirect
+		}
 		*(*[2]uintptr)(unsafe.Pointer(p)) = ivalue.InterfaceData()
 		return
 	}
diff --git a/src/pkg/encoding/gob/doc.go b/src/pkg/encoding/gob/doc.go
index c9ad18e76..96885f8de 100644
--- a/src/pkg/encoding/gob/doc.go
+++ b/src/pkg/encoding/gob/doc.go
@@ -226,7 +226,7 @@ where * signifies zero or more repetitions and the type id of a value must
 be predefined or be defined before the value in the stream.
 
 See "Gobs of data" for a design discussion of the gob wire format:
-http://blog.golang.org/2011/03/gobs-of-data.html
+http://golang.org/doc/articles/gobs_of_data.html
 */
 package gob
 
diff --git a/src/pkg/encoding/gob/encoder_test.go b/src/pkg/encoding/gob/encoder_test.go
index 050786dfd..c4947cbb8 100644
--- a/src/pkg/encoding/gob/encoder_test.go
+++ b/src/pkg/encoding/gob/encoder_test.go
@@ -694,8 +694,8 @@ type Bug3 struct {
 
 func TestGobPtrSlices(t *testing.T) {
 	in := []*Bug3{
-		&Bug3{1, nil},
-		&Bug3{2, nil},
+		{1, nil},
+		{2, nil},
 	}
 	b := new(bytes.Buffer)
 	err := NewEncoder(b).Encode(&in)
diff --git a/src/pkg/encoding/gob/gobencdec_test.go b/src/pkg/encoding/gob/gobencdec_test.go
index 83644c033..45240d764 100644
--- a/src/pkg/encoding/gob/gobencdec_test.go
+++ b/src/pkg/encoding/gob/gobencdec_test.go
@@ -573,3 +573,22 @@ func TestGobEncodeIsZero(t *testing.T) {
 		t.Fatalf("%v != %v", x, y)
 	}
 }
+
+func TestGobEncodePtrError(t *testing.T) {
+	var err error
+	b := new(bytes.Buffer)
+	enc := NewEncoder(b)
+	err = enc.Encode(&err)
+	if err != nil {
+		t.Fatal("encode:", err)
+	}
+	dec := NewDecoder(b)
+	err2 := fmt.Errorf("foo")
+	err = dec.Decode(&err2)
+	if err != nil {
+		t.Fatal("decode:", err)
+	}
+	if err2 != nil {
+		t.Fatalf("expected nil, got %v", err2)
+	}
+}
-- 
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