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https://github.com/golang/go
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c82304b712
For defer/go calls, the function/method value are evaluated immediately. So after devirtualizing, it may trigger a panic when implicitly deref a nil pointer receiver, causing the program behaves unexpectedly. It's safer to not devirtualizing defer/go calls at all. Fixes #52072 Change-Id: I562c2860e3e577b36387dc0a12ae5077bc0766bf Reviewed-on: https://go-review.googlesource.com/c/go/+/428495 Reviewed-by: Michael Knyszek <mknyszek@google.com> Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
33 lines
415 B
Go
33 lines
415 B
Go
// run
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// Copyright 2022 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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type I interface{ M() }
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type T struct {
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x int
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}
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func (T) M() {}
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var pt *T
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func f() (r int) {
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defer func() { recover() }()
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var i I = pt
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defer i.M()
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r = 1
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return
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}
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func main() {
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if got := f(); got != 1 {
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panic(got)
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}
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}
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