Controller method parameters serialized as - null

[yuri1969]

Expected Behavior

Controller method parameter produce a valid OpenAPI YAML parameter definition. Passing tests within tests.patch.txt.

Actual Behaviour

Various controller method parameters (see tests included within tests.patch.txt) produce invalid OpenAPI YAML parameter definitions.

Such null parameters cause various issues, like breaking Swagger UI.

The produced YAML section:

parameters:
- null

Steps To Reproduce

1. Define a controller featuring a @Parameter as @Part CompletedFileUpload
2. Generate the OpenAPI specification
3. Verify content of the parameters subsection

Environment Information

• GNU/Linux
• Temurin 17

Example Application

No response

Version

4.1.6