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// compile
// Copyright 2018 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.
// Triggers a bug in writebarrier, which inserts one
// between (first block) OpAddr x and (second block) a VarDef x,
// which are then in the wrong order and unable to be
// properly scheduled.
package q
var S interface{}
func F(n int) {
fun := func(x int) int {
S = 1
return n
}
i := fun(([]int{})[n])
var fc [2]chan int
S = (([1][2]chan int{fc})[i][i])
}
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