When trying to use the Allure rest-assured filter configured as below:

    @BeforeClass
    public static void initSpec(){
        spec = new RequestSpecBuilder()
                .setContentType(ContentType.JSON)
                .setBaseUri("http://someUri/")
                .addFilter(new AllureRestAssured())
                .build();
    }

    @Test
    public void testGet() {
        given()
                .spec(spec)
                .when()
                .get()
                .then()
                .statusCode(200);
    }

It throws the following error:

java.lang.NullPointerException: Body should not be null value
at java.util.Objects.requireNonNull(Objects.java:228)
at io.qameta.allure.attachment.http.HttpRequestAttachment$Builder.withBody(HttpRequestAttachment.java:131)
at io.qameta.allure.restassured.AllureRestAssured.filter(AllureRestAssured.java:33)

Body should be optional, specially for GET requests which usually don't have a body.