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30 lines
680 B
Go
30 lines
680 B
Go
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// run
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// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import "runtime/debug"
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type T struct {
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// >= 16 bytes to avoid tiny alloc.
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a, b int
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}
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func main() {
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debug.SetGCPercent(1)
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for i := 0; i < 100000; i++ {
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m := make(map[*T]struct{}, 0)
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for j := 0; j < 20; j++ {
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// During the call to mapassign_fast64, the key argument
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// was incorrectly treated as a uint64. If the stack was
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// scanned during that call, the only pointer to k was
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// missed, leading to *k being collected prematurely.
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k := new(T)
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m[k] = struct{}{}
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}
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}
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}
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