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Source file test/fixedbugs/issue20250.go

Documentation: test/fixedbugs

  // errorcheck -0 -live -l -d=compilelater,eagerwb
  // Copyright 2017 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.
  // Issue 20250: liveness differed with concurrent compilation
  // due to propagation of addrtaken to outer variables for
  // closure variables.
  // TODO(austin): This expects function calls to the write barrier, so
  // we enable the legacy eager write barrier. Fix this once the
  // buffered write barrier works on all arches.
  package p
  type T struct {
  	s string
  func f(a T) { // ERROR "live at entry to f: a"
  	var e interface{}
  	func() { // ERROR "live at entry to f.func1: a &e"
  		e = a.s // ERROR "live at call to convT2Estring: a &e" "live at call to writebarrierptr: a"
  	}() // ERROR "live at call to f.func1: e$"
  	// Before the fix, both a and e were live at the previous line.
  	_ = e

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