ext/mysqli: Throw error when mysql_stmt_data_seek cannot be executed (php#10419)

Author: kamil-tekiela

ext/mysqli/mysqli_api.c

@@ -1488,6 +1488,15 @@ PHP_FUNCTION(mysqli_stmt_data_seek)
 
 	MYSQLI_FETCH_RESOURCE_STMT(stmt, mysql_stmt, MYSQLI_STATUS_VALID);
 
+	if (!stmt->stmt->data || !stmt->stmt->data->result || !stmt->stmt->data->result->stored_data) {
+		if (hasThis()) {
+			zend_throw_error(NULL, "mysqli_stmt::data_seek(): No result set associated with the statement");
+		} else {
+			zend_throw_error(NULL, "mysqli_stmt_data_seek(): No result set associated with the statement");
+		}
+		RETURN_THROWS();
+	}
+
 	mysql_stmt_data_seek(stmt->stmt, offset);
 }
 /* }}} */

ext/mysqli/tests/mysqli_stmt_data_seek.phpt

@@ -25,6 +25,11 @@ require_once 'skipifconnectfailure.inc';
     if (true !== ($tmp = mysqli_stmt_execute($stmt)))
         printf("[006] Expecting boolean/true, got %s/%s\n", gettype($tmp), $tmp);
 
+    try {
+        mysqli_stmt_data_seek($stmt, 1);
+    } catch (Error $exception) {
+        echo $exception->getMessage() . "\n";
+    }
 
     $id = null;
     if (!mysqli_stmt_bind_result($stmt, $id))
@@ -82,6 +87,7 @@ require_once 'skipifconnectfailure.inc';
 ?>
 --EXPECT--
 mysqli_stmt object is not fully initialized
+mysqli_stmt_data_seek(): No result set associated with the statement
 int(3)
 int(1)
 int(1)