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// errchk $G $D/$F.go

// 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.

// Check that interface{M()} = *interface{M()} produces a compiler error.

package main

type Inst interface {
        Next() *Inst
}

type Regexp struct {
        code  []Inst
        start Inst
}

type Start struct {
        foo *Inst
}

func (start *Start) Next() *Inst { return nil }


func AddInst(Inst) *Inst {
        print("ok in addinst\n")
        return nil
}

func main() {
        print("call addinst\n")
        var x Inst = AddInst(new(Start)) // ERROR "pointer to interface"
        print("return from  addinst\n")
        var y *Inst = new(Start)  // ERROR "pointer to interface|incompatible type"
}