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// compile
// 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.
// Gccgo used to give an error:
// <built-in>: error: redefinition of ‘s$F$hash’
// <built-in>: note: previous definition of ‘s$F$hash’ was here
// <built-in>: error: redefinition of ‘s$F$equal’
// <built-in>: note: previous definition of ‘s$F$equal’ was here