$ govulncheck -dir ${moddir}/manystacks -v . --> FAIL 3
govulncheck is an experimental tool. Share feedback at https://go.dev/s/govulncheck-feedback.

Scanning for dependencies with known vulnerabilities...
Found 1 known vulnerability.

Vulnerability #1: GO-2020-0040
  Due to unchecked type assertions, maliciously crafted messages
  can cause panics, which may be used as a denial of service
  vector.

  Call stacks in your code:
      #1: for function DHT.GetPeers
        example.com/manystacks.main
            .../main.go:27:2
        example.com/manystacks.main$2
            .../main.go:30:28
        example.com/manystacks/otherpkg.GetPeers
            .../otherpkg.go:6:19
        github.com/shiyanhui/dht.DHT.GetPeers
      #2: for function DHT.Run
        example.com/manystacks.main
            .../main.go:44:7
        github.com/shiyanhui/dht.DHT.Run
      #3: for function New
        example.com/manystacks.main
            .../main.go:16:14
        github.com/shiyanhui/dht.New

  Found in: github.com/shiyanhui/dht@v0.0.0-20201219151056-5a20f3199263
  Fixed in: N/A
  More info: https://pkg.go.dev/vuln/GO-2020-0040

=== Informational ===

The vulnerabilities below are in packages that you import, but your code
doesn't appear to call any vulnerable functions. You may not need to take any
action. See https://pkg.go.dev/golang.org/x/vuln/cmd/govulncheck
for details.

Vulnerability #1: GO-2022-0969
  HTTP/2 server connections can hang forever waiting for a clean shutdown
  that was preempted by a fatal error. This condition can be exploited
  by a malicious client to cause a denial of service.

  Found in: net/http@go1.18
  Fixed in: net/http@go1.19.1
  More info: https://pkg.go.dev/vuln/GO-2022-0969