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Source file test/fixedbugs/issue17449.go

Documentation: test/fixedbugs

     1  // errorcheck -0 -race
     2  
     3  // Copyright 2016 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 17449: race instrumentation copies over previous instrumented nodes from parents block into child's Ninit block.
     8  // This code surfaces the duplication at compile time because of generated inline labels.
     9  
    10  package master
    11  
    12  type PriorityList struct {
    13      elems []interface{}
    14  }
    15  
    16  func (x *PriorityList) Len() int { return len(x.elems) }
    17  
    18  func (l *PriorityList) remove(i int) interface{} {
    19      elem := l.elems[i]
    20      l.elems = append(l.elems[:i], l.elems[i+1:]...)
    21      return elem
    22  }
    23  
    24  func (l *PriorityList) Next() interface{} {
    25      return l.remove(l.Len() - 1)
    26  }
    27  
    28  var l *PriorityList
    29  
    30  func Foo() {
    31      // It would fail here if instrumented code (including inline-label) was copied.
    32      for elem := l.Next(); elem != nil; elem = l.Next() {
    33      }
    34  }
    35  

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