graphql() returns True with GraphQLError

[elbaro]

When missing a variable, I get an error msg but a successful result in GraphQLResult.

from ariadne.graphql import graphql
successfully_executed, execution_result = await graphql(
    executable_schema,
    {
        "query": query,
        "variables": variables,
    },
    context_value=context_value,
    root_value=root_value,
)
print(successfully_executed, execution_result)

True {'data': None, 'errors': [{'message': "Variable '$variableName' of required type 'Boolean!' was not provided.", 'locations': [{'line': 2, 'column': 55}]}]}

Inside the Ariadne code, exec_result is ExecutionResult(data=None, errors=[GraphQLError("Variable '$variableName' of required type 'Boolean!' was not provided.", locations=[SourceLocation(line=2, column=55)])]) which is not caught by except GraphQLError.

            exec_result = execute(
                schema,
                document,
                root_value=root_value,
                context_value=context_value,
                variable_values=variables,
                operation_name=operation_name,
                execution_context_class=execution_context_class,
                middleware=extension_manager.as_middleware_manager(
                    middleware, middleware_manager_class
                ),
                **kwargs,
            )

            if isawaitable(exec_result):
                exec_result = await cast(Awaitable[ExecutionResult], exec_result)

            print("exec_result", exec_result)
        except GraphQLError as error:
            print("error", error)
            error_result = handle_graphql_errors(
                [error],
                logger=logger,
                error_formatter=error_formatter,
                debug=debug,
                extension_manager=extension_manager,
            )

            if result_update:
                return result_update.update_result(error_result)

            return error_result

Is this expected behavior? What determines the successful result?

ariadne==0.26.2