clash [Bug] 使用 Clash 连续多次跑满速的网速测试，100%崩溃

Verify steps

[X] 如果你可以自己 debug 并解决的话，提交 PR 吧 Is this something you can debug and fix? Send a pull request! Bug fixes and documentation fixes are welcome.
[X] 我已经在 Issue Tracker 中找过我要提出的问题 I have searched on the issue tracker for a related issue.
[X] 我已经使用 dev 分支版本测试过，问题依旧存在 I have tested using the dev branch, and the issue still exists.
[X] 我已经仔细看过 Documentation 并无法自行解决问题 I have read the documentation and was unable to solve the issue.
[X] 这是 Clash 核心的问题，并非我所使用的 Clash 衍生版本（如 OpenClash、KoolClash 等）的特定问题 This is an issue of the Clash core per se, not to the derivatives of Clash, like OpenClash or KoolClash.

Clash version

Clash 2022.03.21 linux amd64 with go1.18 Mon 21 Mar 2022 01:54:21 PM UTC

What OS are you seeing the problem on?

Linux

Clash config

port: 7890
socks-port: 7891
redir-port: 7892
mixed-port: 7893
allow-lan: true
mode: Rule
log-level: info
ipv6: false
rules:
- MATCH,DIRECT

Clash log

panic: runtime error: slice bounds out of range [:8192] with capacity 4096

goroutine 599 [running]:
bufio.(*Reader).ReadSlice(0xc00051c5a0, 0x0?)
        bufio/bufio.go:346 +0x22d
bufio.(*Reader).ReadLine(0xc00051c5a0)
        bufio/bufio.go:400 +0x27
net/textproto.(*Reader).readLineSlice(0xc000229230)
        net/textproto/reader.go:57 +0x99
net/textproto.(*Reader).ReadLine(...)
        net/textproto/reader.go:38
net/http.readRequest(0xc0001af170?)
        net/http/request.go:1029 +0x79
github.com/Dreamacro/clash/listener/http.HandleConn({0xd185a8, 0xc0002612c8}, 0x7fac3e6942d8?, 0xc000127980)
        github.com/Dreamacro/clash/listener/http/proxy.go:32 +0x308
created by github.com/Dreamacro/clash/listener/http.NewWithAuthenticate.func1
        github.com/Dreamacro/clash/listener/http/server.go:60 +0xd8