go/test/fixedbugs/issue68816.go
Keith Randall 3de175f383 cmd/compile: in prove pass, check for unsat before adding local facts
Local facts can get us to unsatisfiable because there is an
unconditional panic in the block. That shouldn't declare the whole
block as unreachable, because we do still need to enter it to get
that panic.

Fixes #68816

Change-Id: I9220edb46089690702d2eb61d112815c7ac91f16
Reviewed-on: https://go-review.googlesource.com/c/go/+/604118
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Keith Randall <khr@golang.org>
2024-08-09 20:53:07 +00:00

42 lines
566 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() {
mustPanic(func() {
f1(1)
})
f2(1, 0) // must not panic
mustPanic(func() {
f2(1, 2)
})
}
var v []func()
//go:noinline
func f1(i int) {
v = make([]func(), -2|i)
}
//go:noinline
func f2(i, j int) {
if j > 0 {
v = make([]func(), -2|i)
}
}
func mustPanic(f func()) {
defer func() {
r := recover()
if r == nil {
panic("didn't panic")
}
}()
f()
}