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87 lines
1.4 KiB
87 lines
1.4 KiB
// errorcheck -0 -l -d=defer
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// Copyright 2019 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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// check that open-coded defers are used in expected situations
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package main
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import "fmt"
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var glob = 3
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func f1() {
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for i := 0; i < 10; i++ {
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fmt.Println("loop")
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}
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defer func() { // ERROR "open-coded defer"
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fmt.Println("defer")
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}()
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}
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func f2() {
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for {
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defer func() { // ERROR "heap-allocated defer"
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fmt.Println("defer1")
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}()
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if glob > 2 {
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break
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}
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}
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defer func() { // ERROR "stack-allocated defer"
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fmt.Println("defer2")
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}()
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}
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func f3() {
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defer func() { // ERROR "stack-allocated defer"
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fmt.Println("defer2")
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}()
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for {
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defer func() { // ERROR "heap-allocated defer"
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fmt.Println("defer1")
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}()
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if glob > 2 {
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break
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}
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}
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}
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func f4() {
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defer func() { // ERROR "open-coded defer"
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fmt.Println("defer")
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}()
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label:
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fmt.Println("goto loop")
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if glob > 2 {
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goto label
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}
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}
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func f5() {
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label:
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fmt.Println("goto loop")
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defer func() { // ERROR "heap-allocated defer"
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fmt.Println("defer")
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}()
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if glob > 2 {
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goto label
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}
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}
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func f6() {
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label:
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fmt.Println("goto loop")
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if glob > 2 {
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goto label
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}
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// The current analysis doesn't end a backward goto loop, so this defer is
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// considered to be inside a loop
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defer func() { // ERROR "heap-allocated defer"
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fmt.Println("defer")
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}()
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}
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