OpenAPI generating incorrect requestBody example

[smithamax]

Design

package design

import (
	. "goa.design/goa/v3/dsl"
)

var _ = Service("foo", func() {
	Method("create", func() {
		Payload(func() {
			Attribute("foo", Foo, "foo")
		})

		HTTP(func() {
			POST("/foo")
			Body("foo")
		})
	})
})

var _ = Service("bar", func() {
	Method("create", func() {
		Payload(func() {
			Attribute("bar", Bar, "bar")
		})

		HTTP(func() {
			POST("/bar")
			Body("bar")
		})
	})
})

var Foo = Type("Foo", func() {
	Attribute("index", Int, "index of foo")
})

var Bar = Type("Bar", func() {
	Attribute("name", String, "name of bar")
})

Results in an incorrect example being generated for bar requestBody, foo is used to generate the example

                    application/json:
                        schema:
                            $ref: '#/components/schemas/Bar'
                        example:
                            index: 1078416284801620699

Full output

openapi: 3.0.3
info:
    title: Goa API
    version: 0.0.1
servers:
    - url: http://localhost:80
      description: Default server for foo
paths:
    /bar:
        post:
            tags:
                - bar
            summary: create bar
            operationId: bar#create
            requestBody:
                description: bar
                required: true
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/Bar'
                        example:
                            index: 1078416284801620699
            responses:
                "204":
                    description: No Content response.
    /foo:
        post:
            tags:
                - foo
            summary: create foo
            operationId: foo#create
            requestBody:
                description: foo
                required: true
                content:
                    application/json:
                        schema:
                            $ref: '#/components/schemas/Foo'
                        example:
                            index: 1078416284801620699
            responses:
                "204":
                    description: No Content response.
components:
    schemas:
        Bar:
            type: object
            properties:
                name:
                    type: string
                    description: name of bar
                    example: Vero nisi sint eum.
            example:
                name: Itaque tempore omnis quia.
        Foo:
            type: object
            properties:
                index:
                    type: integer
                    description: index of foo
                    example: 4530605782497482443
                    format: int64
            example:
                index: 3714141415529535030