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84 lines
1.6 KiB
84 lines
1.6 KiB
4 months ago
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// run
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// Copyright 2010 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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// Test recovering from runtime errors.
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package main
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import (
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"runtime"
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"strings"
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)
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var didbug bool
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func bug() {
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if didbug {
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return
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}
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println("BUG")
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didbug = true
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}
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func check(name string, f func(), err string) {
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defer func() {
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v := recover()
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if v == nil {
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bug()
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println(name, "did not panic")
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return
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}
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runt, ok := v.(runtime.Error)
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if !ok {
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bug()
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println(name, "panicked but not with runtime.Error")
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return
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}
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s := runt.Error()
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if strings.Index(s, err) < 0 {
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bug()
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println(name, "panicked with", s, "not", err)
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return
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}
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}()
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f()
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}
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func main() {
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var x int
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var x64 int64
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var p *[10]int
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var q *[10000]int
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var i int
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check("int-div-zero", func() { println(1 / x) }, "integer divide by zero")
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check("int64-div-zero", func() { println(1 / x64) }, "integer divide by zero")
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check("nil-deref", func() { println(p[0]) }, "nil pointer dereference")
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check("nil-deref-1", func() { println(p[1]) }, "nil pointer dereference")
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check("nil-deref-big", func() { println(q[5000]) }, "nil pointer dereference")
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i = 99999
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var sl []int
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p1 := new([10]int)
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check("array-bounds", func() { println(p1[i]) }, "index out of range")
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check("slice-bounds", func() { println(sl[i]) }, "index out of range")
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var inter interface{}
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inter = 1
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check("type-concrete", func() { println(inter.(string)) }, "int, not string")
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check("type-interface", func() { println(inter.(m)) }, "missing method m")
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if didbug {
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panic("recover3")
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}
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}
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type m interface {
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m()
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}
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