[travisd]

Worth noting that some of these can be detected statically -- and some are detected by go vet (e.g., passing a sync.Mutex by value). I don't think it detects the wg.Add bug, but that seems relatively straightforward(†) to add a check for.

(†famous last words, I know)

[kjksf]

staticcheck has a check for wg.Add misuse (https://staticcheck.io/docs/checks, https://staticcheck.io/docs/checks#SA2000)