more interface checks:

	- pointer to interface cannot have methods
	- record type names for better runtime error

R=r,ken
DELTA=85  (80 added, 0 deleted, 5 changed)
OCL=16658
CL=16722

3 files changed, 75 insertions, 0 deletions

diff --git a/test/golden.out b/test/golden.out
index 9e8cbcf2ed..5fcde59824 100644
--- a/test/golden.out
+++ b/test/golden.out
@@ -2,6 +2,20 @@
 =========== ./helloworld.go
 hello, world
 
+=========== ./interface1.go
+./interface1.go:5: syntax error near package
+./interface1.go:31: illegal types for operand: AS
+	interface { Next () (*Inst) }
+	*Inst
+
+=========== ./interface2.go
+cannot convert type S to interface I: missing method Foo
+throw: interface conversion
+SIGSEGV: segmentation violation
+Faulting address: 0x0
+pc: xxx
+
+
 =========== ./peano.go
 0! = 1
 1! = 1
@@ -64,6 +78,7 @@ BUG: compilation should succeed
 
 =========== bugs/bug074.go
 bugs/bug074.go:6: syntax error near string
+bugs/bug074.go:6: syntax error near string
 bugs/bug074.go:7: x: undefined
 BUG: compiler crashes - Bus error
 
diff --git a/test/interface1.go b/test/interface1.go
new file mode 100644
index 0000000000..a6430cd1b6
--- /dev/null
+++ b/test/interface1.go
@@ -0,0 +1,37 @@
+// errchk $G $D/$F.go
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+package main
+
+type Inst interface {
+	Next()	*Inst;
+}
+
+type Regexp struct {
+	code *[]Inst;
+	start	Inst;
+}
+
+type Start struct {
+	foo	*Inst;
+}
+
+func (start *Start) Next() *Inst { return nil }
+
+
+func AddInst(Inst) *Inst {
+	print("ok in addinst\n");
+	return nil
+}
+
+func main() {
+	re := new(Regexp);
+	print("call addinst\n");
+	var x Inst = AddInst(new(Start));
+	print("return from  addinst\n");
+}
diff --git a/test/interface2.go b/test/interface2.go
new file mode 100644
index 0000000000..8dfc9d8ff5
--- /dev/null
+++ b/test/interface2.go
@@ -0,0 +1,23 @@
+// $G $D/$F.go && $L $F.$A && ! ./$A.out
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+type S struct
+
+type I interface {
+	Foo()
+}
+
+func main() {
+	var s *S;
+	var i I;
+	i = s;
+}
+
+// hide S down here to avoid static warning
+type S struct {
+}