cmd/gc: fix import of package with var func returning _

Fixes issue 8280.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews, r
https://codereview.appspot.com/146240043

3 files changed, 17 insertions, 0 deletions

diff --git a/test/fixedbugs/issue8280.dir/a.go b/test/fixedbugs/issue8280.dir/a.go
new file mode 100644
index 000000000..588536e79
--- /dev/null
+++ b/test/fixedbugs/issue8280.dir/a.go
@@ -0,0 +1,3 @@
+package a
+
+var Bar = func() (_ int) { return 0 }
diff --git a/test/fixedbugs/issue8280.dir/b.go b/test/fixedbugs/issue8280.dir/b.go
new file mode 100644
index 000000000..c46c55458
--- /dev/null
+++ b/test/fixedbugs/issue8280.dir/b.go
@@ -0,0 +1,5 @@
+package b
+
+import "./a"
+
+var foo = a.Bar
diff --git a/test/fixedbugs/issue8280.go b/test/fixedbugs/issue8280.go
new file mode 100644
index 000000000..91256c852
--- /dev/null
+++ b/test/fixedbugs/issue8280.go
@@ -0,0 +1,9 @@
+// compiledir
+
+// Copyright 2014 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.
+
+// Issue 8280: cannot import package exporting a func var returning a result named _
+
+package ignored