errcheck: empty selector name. (golangci#2309)

Author: ldez

pkg/golinters/errcheck.go

@@ -66,9 +66,14 @@ func NewErrcheck() *goanalysis.Linter {
 			for i, err := range errcheckIssues.UncheckedErrors {
 				var text string
 				if err.FuncName != "" {
+					code := err.SelectorName
+					if err.SelectorName == "" {
+						code = err.FuncName
+					}
+
 					text = fmt.Sprintf(
 						"Error return value of %s is not checked",
-						formatCode(err.SelectorName, lintCtx.Cfg),
+						formatCode(code, lintCtx.Cfg),
 					)
 				} else {
 					text = "Error return value is not checked"