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master
test/fixedbugs/issue63657.go
48 строк
677 B
Keith Randall
cmd/compile: ensure pointer arithmetic happens after the nil check
31 окт 2023, 23:45
31 окт 2023, 23:45
962ccbe
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// run // Copyright 2023 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. // Make sure address calculations don't float up before // the corresponding nil check. package main type T struct { a, b int } //go:noinline func f(x *T, p *bool, n int) { *p = n != 0 useStack(1000) g(&x.b) } //go:noinline func g(p *int) { } func useStack(n int) { if n == 0 { return } useStack(n - 1) } func main() { mustPanic(func() { var b bool f(nil, &b, 3) }) } func mustPanic(f func()) { defer func() { if recover() == nil { panic("expected panic, got nil") } }() f() }