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master
test/fixedbugs/issue32288.go
48 строк
809 B
Keith Randall
cmd/compile: don't move nil checks across a VarDef
01 июн 2019, 00:52
01 июн 2019, 00:52
64c134f
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// run // Copyright 2019 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 type T struct { s [1]string pad [16]uintptr } //go:noinline func f(t *int, p *int) []T { var res []T for { var e *T res = append(res, *e) } } func main() { defer func() { useStack(100) // force a stack copy // We're expecting a panic. // The bug in this issue causes a throw, which this recover() will not squash. recover() }() junk() // fill the stack with invalid pointers f(nil, nil) } func useStack(n int) { if n == 0 { return } useStack(n - 1) } //go:noinline func junk() uintptr { var a [128]uintptr // 1k of bad pointers on the stack for i := range a { a[i] = 0xaa } return a[12] }