Merge PR #4608: More linters - Gosec, staticcheck

server/test_helpers.go

@@ -16,7 +16,7 @@ import (
 // Get a free address for a test tendermint server
 // protocol is either tcp, http, etc
 func FreeTCPAddr() (addr, port string, err error) {
-	l, err := net.Listen("tcp", "0.0.0.0:0")
+	l, err := net.Listen("tcp", "localhost:0")
 	if err != nil {
 		return "", "", err
 	}

server/util.go

@@ -99,6 +99,9 @@ func interceptLoadConfig() (conf *cfg.Config, err error) {
 
 	if conf == nil {
 		conf, err = tcmd.ParseConfig() // NOTE: ParseConfig() creates dir/files as necessary.
+		if err != nil {
+			panic(err)
+		}
 	}
 
 	appConfigFilePath := filepath.Join(rootDir, "config/app.toml")