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master
test/fixedbugs/issue54343.go
45 строк
695 B
Matthew Dempsky
test: make issue54343.go robust against the tiny allocator
11 авг 2022, 23:13
11 авг 2022, 23:13
8743198
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// run // Copyright 2022 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. package main import "runtime" func main() { if wait() { panic("GC'd early") } m = nil if !wait() { panic("never GC'd") } } var m = New[int]().M func New[X any]() *T[X] { p := new(T[X]) runtime.SetFinalizer(p, func(*T[X]) { close(done) }) return p } type T[X any] [4]int // N.B., [4]int avoids runtime's tiny object allocator func (*T[X]) M() {} var done = make(chan int) func wait() bool { for i := 0; i < 10; i++ { runtime.GC() select { case <-done: return true default: } } return false }