Parser does not validate GET request with request body

According to OpenAPI specification v3 GET, DELETE and HEAD are no longer allowed to have request body because it does not have defined semantics as per RFC 7231.

When validating a definition file with below path in which GET request has request body, using https://editor.swagger.io/, it gives a semantic error saying GET operations cannot have a requestBody. which is compatible with OpenAPI specification.

However when using the swagger-parser in my java project it does not return any parser error. I have tried the both 2.0.27 and 2.0.24 versions which are listed in the Maven central repository.

Sample OpenAPI definition

paths:
  /pets/{petId}:
    get:
      summary: Info for a specific pet
      operationId: showPetById
      tags:
        - pets
      parameters:
        - name: petId
          in: path
          required: true
          description: The id of the pet to retrieve
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              properties:
                name:
                  type: string
              type: object
        required: false
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Pet"

Start with the sample OpenAPI definition containing a requestBody under a GET operation, and compare swagger-parser 2.0.24 and 2.0.27 with the semantic error reported by editor.swagger.io. Done means validation reports an error for request bodies on GET, DELETE, and HEAD operations.