mirror of
https://github.com/golang/go
synced 2024-11-16 16:54:39 -07:00
2589a89468
The itab we're initializing again, just to figure out which method is missing, might be stored in read-only memory. This can only happen in certain weird generics situations, so it is pretty rare, but it causes a runtime crash when it does happen. Fixes #65962 Change-Id: Ia86e216fe33950a794ad8e475e76317f799e9136 Reviewed-on: https://go-review.googlesource.com/c/go/+/567615 Reviewed-by: Cherry Mui <cherryyz@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@google.com>
49 lines
625 B
Go
49 lines
625 B
Go
// run
|
|
|
|
// Copyright 2024 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
|
|
|
|
func main() {
|
|
test1()
|
|
test2()
|
|
}
|
|
|
|
type I interface {
|
|
f()
|
|
g()
|
|
h()
|
|
}
|
|
|
|
//go:noinline
|
|
func ld[T any]() {
|
|
var x I
|
|
if _, ok := x.(T); ok {
|
|
}
|
|
}
|
|
|
|
func isI(x any) {
|
|
_ = x.(I)
|
|
}
|
|
|
|
func test1() {
|
|
defer func() { recover() }()
|
|
ld[bool]() // add <bool,I> itab to binary
|
|
_ = any(false).(I)
|
|
}
|
|
|
|
type B bool
|
|
|
|
func (B) f() {
|
|
}
|
|
func (B) g() {
|
|
}
|
|
|
|
func test2() {
|
|
defer func() { recover() }()
|
|
ld[B]() // add <B,I> itab to binary
|
|
_ = any(B(false)).(I)
|
|
}
|