Fix: RowScanner errors are fatal to Rows

https://github.com/jackc/pgx/issues/1654

rows.go

@@ -231,7 +231,11 @@ func (rows *baseRows) Scan(dest ...any) error {
 
 	if len(dest) == 1 {
 		if rc, ok := dest[0].(RowScanner); ok {
-			return rc.ScanRow(rows)
+			err := rc.ScanRow(rows)
+			if err != nil {
+				rows.fatal(err)
+			}
+			return err
 		}
 	}
 

rows_test.go

@@ -36,6 +36,22 @@ func TestRowScanner(t *testing.T) {
 	})
 }
 
+type testErrRowScanner string
+
+func (ers *testErrRowScanner) ScanRow(rows pgx.Rows) error {
+	return errors.New(string(*ers))
+}
+
+func TestRowScannerErrorIsFatalToRows(t *testing.T) {
+	t.Parallel()
+
+	defaultConnTestRunner.RunTest(context.Background(), t, func(ctx context.Context, t testing.TB, conn *pgx.Conn) {
+		s := testErrRowScanner("foo")
+		err := conn.QueryRow(ctx, "select 'Adam' as name, 72 as height").Scan(&s)
+		require.EqualError(t, err, "foo")
+	})
+}
+
 func TestForEachRow(t *testing.T) {
 	t.Parallel()