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+// errorcheck
+
+// 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.
+
+// Test that incorrect uses of the blank identifier are caught.
+// Does not compile.
+
+package _ // ERROR "invalid package name"
+
+var t struct {
+ _ int
+}
+
+func (x int) _() { // ERROR "methods on non-local type"
+ println(x)
+}
+
+type T struct {
+ _ []int
+}
+
+func main() {
+ _() // ERROR "cannot use .* as value"
+ x := _+1 // ERROR "cannot use .* as value"
+ _ = x
+ _ = t._ // ERROR "cannot refer to blank field|invalid use of|t._ undefined"
+
+ var v1, v2 T
+ _ = v1 == v2 // ERROR "cannot be compared|non-comparable|cannot compare v1 == v2"
+}