1 // run 2 3 // Copyright 2017 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 package main 8 9 import ( 10 "os" 11 "runtime" 12 ) 13 14 func foo(x int) int { 15 return x + 1 16 } 17 18 func test() { 19 defer func() { 20 if r := recover(); r != nil { 21 pcs := make([]uintptr, 10) 22 n := runtime.Callers(0, pcs) 23 pcs = pcs[:n] 24 frames := runtime.CallersFrames(pcs) 25 for { 26 f, more := frames.Next() 27 if f.Function == "main.foo" { 28 println("did not expect to see call to foo in stack trace") 29 os.Exit(1) 30 } 31 if !more { 32 break 33 } 34 } 35 } 36 }() 37 var v []int 38 foo(v[0]) 39 } 40 41 func bar(x ...int) int { 42 return x[0] + 1 43 } 44 45 func testVariadic() { 46 defer func() { 47 if r := recover(); r != nil { 48 pcs := make([]uintptr, 10) 49 n := runtime.Callers(0, pcs) 50 pcs = pcs[:n] 51 frames := runtime.CallersFrames(pcs) 52 for { 53 f, more := frames.Next() 54 if f.Function == "main.bar" { 55 println("did not expect to see call to bar in stack trace") 56 os.Exit(1) 57 } 58 if !more { 59 break 60 } 61 } 62 } 63 }() 64 var v []int 65 bar(v[0]) 66 } 67 68 func main() { 69 test() 70 testVariadic() 71 } 72
