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Source file test/fixedbugs/issue11286.go

Documentation: test/fixedbugs

  // run
  
  // Copyright 2015 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.
  
  // Test that pointer bitmaps of types with large scalar tails are
  // correctly repeated when unrolled into the heap bitmap.
  
  package main
  
  import "runtime"
  
  const D = 57
  
  type T struct {
  	a [D]float64
  	b map[string]int
  	c [D]float64
  }
  
  var ts []T
  
  func main() {
  	ts = make([]T, 4)
  	for i := range ts {
  		ts[i].b = make(map[string]int)
  	}
  	ts[3].b["abc"] = 42
  	runtime.GC()
  	if ts[3].b["abc"] != 42 {
  		panic("bad field value")
  	}
  }
  

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