cmd/compile/internal/gc: don't ignore EOF in new parser

Fixes #13274.
Fixes #13272.

Change-Id: Ie67a2c4671ee2b49831898fff7677cd65d780942
Reviewed-on: https://go-review.googlesource.com/16972
Reviewed-by: Chris Manghane <[email protected]>

Author: griesemer

src/cmd/compile/internal/gc/parser.go

@@ -88,7 +88,7 @@ func (p *parser) got(tok int32) bool {
 }
 
 func (p *parser) want(tok int32) {
-	if p.tok != EOF && !p.got(tok) {
+	if !p.got(tok) {
 		p.syntax_error("")
 		p.advance()
 	}
@@ -293,6 +293,8 @@ func (p *parser) file() {
 	}
 
 	xtop = concat(xtop, p.xdcl_list())
+
+	p.want(EOF)
 }
 
 // go.y:package

test/fixedbugs/issue13274.go

@@ -0,0 +1,11 @@
+// errorcheck
+
+// Copyright 2015 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.
+
+// Check that we don't ignore EOF.
+
+package p
+
+var f = func() { // ERROR "unexpected EOF"