test: match gccgo error messages

Added a return to bug357.go to avoid an error which gccgo
reports but 6g does not.

bug353.go:16:14: error: reference to undefined identifer ‘io.ReadWriterCloser’

bug357.go:18:2: error: value computed is not used

bug358.go:14:11: error: imported and not used: ioutil
bug358.go:19:9: error: invalid use of type

bug359.go:25:14: error: redefinition of ‘a’
bug359.go:25:6: note: previous definition of ‘a’ was here
bug359.go:19:6: error: incompatible type in initialization (implicit assignment of ‘list.List’ hidden field ‘front’)

bug362.go:13:6: error: iota is only defined in const declarations
bug362.go:14:6: error: iota is only defined in const declarations
bug362.go:15:6: error: iota is only defined in const declarations

bug363.go:13:12: error: shift of non-integer operand
bug363.go:16:12: error: shift of non-integer operand

bug365.go:15:8: error: expected package

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5078046

test/fixedbugs/bug353.go

@@ -13,7 +13,7 @@ import (
 	"os"
 )
 
-func echo(fd io.ReadWriterCloser) { // ERROR "undefined: io.ReadWriterCloser"
+func echo(fd io.ReadWriterCloser) { // ERROR "undefined.*io.ReadWriterCloser"
 	var buf [1024]byte
 	for {
 		n, err := fd.Read(buf)

test/fixedbugs/bug357.go

@@ -15,8 +15,9 @@ func bla1() bool {
 
 func bla5() bool {
 	_ = 1
-	false  // ERROR "false not used"
+	false  // ERROR "false not used|value computed is not used"
 	_ = 2
+	return false
 }
 
 func main() {

test/fixedbugs/bug358.go

@@ -11,12 +11,12 @@ package main
 
 import (
 	"http"
-	"io/ioutil"
+	"io/ioutil"	// GCCGO_ERROR "imported and not used"
 	"os"
 )
 
 func makeHandler(fn func(http.ResponseWriter, *http.Request, string)) http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request)  // ERROR "syntax error"
+	return func(w http.ResponseWriter, r *http.Request)  // ERROR "syntax error|invalid use of type"
 }
 
 type Page struct {

test/fixedbugs/bug359.go

@@ -16,11 +16,11 @@ type Painting struct {
 }
 
 func (p Painting) Foo() {
-	for e := p.fragments; e.Front() != nil; {  // ERROR "unexported field"
+	for e := p.fragments; e.Front() != nil; {  // ERROR "unexported field|hidden field"
 	}
 }
 
 // from comment 4 of issue 1910
 type Foo interface {
-	Run(a int) (a int)  // ERROR "a redeclared"
+	Run(a int) (a int)  // ERROR "a redeclared|redefinition|previous"
 }

test/fixedbugs/bug362.go

@@ -10,7 +10,7 @@
 package main
 
 var (
-	a = iota  // ERROR "undefined: iota"
-	b = iota  // ERROR "undefined: iota"
-	c = iota  // ERROR "undefined: iota"
+	a = iota  // ERROR "undefined: iota|iota is only defined in const"
+	b = iota  // ERROR "undefined: iota|iota is only defined in const"
+	c = iota  // ERROR "undefined: iota|iota is only defined in const"
 )

test/fixedbugs/bug363.go

@@ -10,10 +10,10 @@ package main
 
 func main() {
 	var i uint = 33
-	var a = (1<<i) + 4.5  // ERROR "shift of type float64"
+	var a = (1<<i) + 4.5  // ERROR "shift of type float64|shift of non-integer"
 	println(a)
 	
-	var b = (1<<i) + 4.0  // ERROR "shift of type float64"
+	var b = (1<<i) + 4.0  // ERROR "shift of type float64|shift of non-integer"
 	println(b)
 
 	var c int64 = (1<<i) + 4.0  // ok - it's all int64

test/fixedbugs/bug365.go

@@ -12,7 +12,7 @@
 package main
 
 type S struct {
-	err os.Error  // ERROR "undefined"
+	err os.Error  // ERROR "undefined|expected package"
 	Num int
 }