Content type multipart/form-data with property object or boolean results in a fatal error

[leumatt]

Jane version(s) affected: 7.5.1

Description

A fatal error occurs when executing a POST operation with content type multipart/form-data that contains a type property different from string or integer => object, boolean,number,array

First argument to "Http\Message\MultipartStream\MultipartStreamBuilder::createStream()" must be a string, resource or StreamInterface.

How to reproduce
Generate a client for a POST operation with multipart/form-data and try to execute the operation.

OpenApi File

{
  "openapi": "3.0.1",
  "info": {
    "title": "API Test",
    "version": "1.0"
  },
  "paths": {
    "/File": {
      "post": {
        "requestBody": {
          "content": {
            "multipart/form-data": {
              "schema": {
                "type": "object",
                "properties": {
                  "fichier": {
                    "type": "string",
                    "format": "binary"
                  },
                  "item": {
                    "type": "object",
                    "properties": {
                      "itemId": {
                        "type": "integer"
                      },
                      "itemType": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "description",
            "content": {
              "application/json": {
                "schema": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}