rowserrcheck: fix reports false positive (golangci#1670)

Author: jingyugao

go.mod

@@ -30,7 +30,7 @@ require (
 	github.com/golangci/revgrep v0.0.0-20180526074752-d9c87f5ffaf0
 	github.com/golangci/unconvert v0.0.0-20180507085042-28b1c447d1f4
 	github.com/jgautheron/goconst v0.0.0-20201117150253-ccae5bf973f3
-	github.com/jingyugao/rowserrcheck v0.0.0-20191204022205-72ab7603b68a
+	github.com/jingyugao/rowserrcheck v0.0.0-20210130005344-c6a0c12dd98d
 	github.com/jirfag/go-printf-func-name v0.0.0-20191110105641-45db9963cdd3
 	github.com/kulti/thelper v0.2.1
 	github.com/kunwardeep/paralleltest v1.0.2

go.sum

@@ -3,6 +3,8 @@ package testdata
 
 import (
 	"database/sql"
+	"fmt"
+	"math/rand"
 )
 
 func RowsErrNotChecked(db *sql.DB) {
@@ -11,3 +13,27 @@ func RowsErrNotChecked(db *sql.DB) {
 
 	}
 }
+
+func issue943(db *sql.DB) {
+	var rows *sql.Rows
+	var err error
+
+	if rand.Float64() < 0.5 {
+		rows, err = db.Query("select 1")
+	} else {
+		rows, err = db.Query("select 2")
+	}
+	if err != nil {
+		panic(err)
+	}
+
+	defer rows.Close()
+
+	for rows.Next() {
+		fmt.Println("new rows")
+	}
+
+	if err := rows.Err(); err != nil {
+		panic(err)
+	}
+}