1// run
2
3// Copyright 2015 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// Test that pointer bitmaps of types with large scalar tails are
8// correctly repeated when unrolled into the heap bitmap.
9
10package main
11
12import "runtime"
13
14const D = 57
15
16type T struct {
17	a [D]float64
18	b map[string]int
19	c [D]float64
20}
21
22var ts []T
23
24func main() {
25	ts = make([]T, 4)
26	for i := range ts {
27		ts[i].b = make(map[string]int)
28	}
29	ts[3].b["abc"] = 42
30	runtime.GC()
31	if ts[3].b["abc"] != 42 {
32		panic("bad field value")
33	}
34}
35