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      1 // errorcheck
      2 
      3 // Copyright 2013 The Go Authors. All rights reserved.
      4 // Use of this source code is governed by a BSD-style
      5 // license that can be found in the LICENSE file.
      6 
      7 // Issue 4909: compiler incorrectly accepts unsafe.Offsetof(t.x)
      8 // where x is a field of an embedded pointer field.
      9 
     10 package p
     11 
     12 import (
     13 	"unsafe"
     14 )
     15 
     16 type T struct {
     17 	A int
     18 	*B
     19 }
     20 
     21 func (t T) Method() {}
     22 
     23 type B struct {
     24 	X, Y int
     25 }
     26 
     27 var t T
     28 var p *T
     29 
     30 const N1 = unsafe.Offsetof(t.X)      // ERROR "indirection"
     31 const N2 = unsafe.Offsetof(p.X)      // ERROR "indirection"
     32 const N3 = unsafe.Offsetof(t.B.X)    // valid
     33 const N4 = unsafe.Offsetof(p.B.X)    // valid
     34 const N5 = unsafe.Offsetof(t.Method) // ERROR "method value"
     35 const N6 = unsafe.Offsetof(p.Method) // ERROR "method value"
     36