openapi: 3.0.0
components:
  schemas:
    A:
      description: a schema
      type: string
      format: byte
    complexOneOfError:
      description: second oneOf should be array
      oneOf:
        - oneOf:
            $ref: '#/components/schemas/A'
    complexAllOfError:
      description: allOf should be array
      oneOf:
        - allOf:
            type: string
    complexAnyOfError:
      description: anyOf should be array
      oneOf:
        - anyOf:
            $ref: '#/components/schemas/A'