Misleading error message when swagger document contains errors in $ref property #1262

The following swagger document contains an error in a $ref property. It is missing a forward slash after the hash. Correct value should be #/components/schemas/Item

openapi: 3.0.3
info:
  title: test
  version: 1.0.0
paths:
  /test:
    get:
      responses:
        '200':
          description: successful operation
          content:
            application/json:
              schema:
                $ref: '#components/schemas/Item'
components:
  schemas:
    Item:
      type: object
      properties:
        id:
          type: integer

Using kiota to show or generate on this document..

kiota show -d "C:\test.yaml"
kiota generate -d "C:\test.yaml" -l csharp -o apiClient

...will yield a misleading error message

crit: Kiota.Builder.KiotaBuilder[0]
      error generating the client: Could not find file 'C:\test.yam'.

There's no discussion the document is invalid. But you need to use another tool to find the actual error.

Strangely though, https://editor-next.swagger.io/ will successfully generate a working swaggerUI, but will correctly indicate the error in the editor. While https://apitools.dev/swagger-parser/online/# will let successfully validate the document with no errors or warnings.