TestCopyRespLoopConnectionError: Always ignore errors on stmt.Close()

Since recent versions of Go now report the error in Stmt.Close(), we
should not expect it to be nil.

copy_test.go

@@ -382,6 +382,7 @@ func TestCopyRespLoopConnectionError(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+	defer stmt.Close()
 
 	_, err = db.Exec("SELECT pg_terminate_backend($1)", pid)
 	if err != nil {
@@ -404,20 +405,15 @@ func TestCopyRespLoopConnectionError(t *testing.T) {
 	pge, ok := err.(*Error)
 	if !ok {
 		if err == driver.ErrBadConn {
-			// Likely an EPIPE
-			_ = stmt.Close()
-			return
+			// likely an EPIPE
 		} else {
 			t.Fatalf("expected *pq.Error or driver.ErrBadConn, got %+#v", err)
 		}
 	} else if pge.Code.Name() != "admin_shutdown" {
 		t.Fatalf("expected admin_shutdown, got %s", pge.Code.Name())
 	}
 
-	err = stmt.Close()
-	if err != nil {
-		t.Fatal(err)
-	}
+	_ = stmt.Close()
 }
 
 func BenchmarkCopyIn(b *testing.B) {