解析cookie报数组越界，猜测是并发问题导致

[leoperfect]

线上偶现panic，报错如下
slice bounds out of range [94:93]，错误在 copy(h.h[i:], h.h[i+1:])这一行。 这一行的作用是将当前遍历的cookie移除，不应该会数组越界才对，下面是源码部分。

func (h *RequestHeader) collectCookies() {
	if h.cookiesCollected {
		return
	}
        for i, n := 0, len(h.h); i < n; i++ {
		kv := &h.h[i]
		if bytes.Equal(kv.key, bytestr.StrCookie) {
			h.cookies = parseRequestCookies(h.cookies, kv.value)
			tmp := *kv
			copy(h.h[i:], h.h[i+1:])
			n--
			i--
			h.h[n] = tmp
			h.h = h.h[:n]
		}
	}
	h.cookiesCollected = true
}

[github-actions]

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