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golang在recover里面发生panic
source link: https://baorongquan.github.io/2018/05/12/golang%E5%9C%A8recover%E9%87%8C%E9%9D%A2%E5%8F%91%E7%94%9Fpanic/
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golang在recover里面发生panic
最近在排查代码的时候，发现同事有一段代码在recover里面关闭连接结果导致panic，造成程序异常退出的现象。
用一个小试例记录一下，正常代码在recover里面打印捕获到的信息为：
package main
import "fmt"
func main() {
for i := 0; i < 10; i++ {
fmt.Println("end main")
func f(i int) {
defer func() {
if r := recover(); r != nil {
fmt.Println("Recover :", r)
// panic(r)
if i == 8 {
panic("panic when i == 8")
fmt.Println(i)
程序可以正常执行，输出如下：
0
1
2
3
4
5
6
7
Recover : panic when i == 8
9
end main
但是如果在recover里面的panic注释去掉，模拟产生panic，再次运行就会发生错误。
所以切忌不要在recover里面发生panic，如关闭不存在的连接等。
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