RAML Extension causes object arrays within resource type examples to contain duplicate members

[brennana]

• I'm submitting a ...

  • bug report
  • feature request
  • question
  • other

• What is the current behavior?
  When extending a RAML document with a RAML Extension (even a trivial extension with no additional content), examples (included via a resource type) that contain arrays of object types will have their members duplicated.

Essentially, the following, used as an example in a resource type:

{ "prop1": "ok", "prop2": [{"id": "1"}, {"id": "2"}], "prop3": ["one", "two"] }

becomes this after document resolution:

prop1: ok
prop2:
  -
    id: "1"
  -
    id: "1"
  -
    id: "2"
  -
    id: "2"
prop3:
  - one
  - two

It does not appear that this bug occurs without the examples being embedded within a resource type. Examples defined in-line in a resource seem to be unaffected. Furthermore, arrays of scalar values, like strings, also seem to be unaffected.

• If the current behavior is a bug, please provide the minimal steps to reproduce with AMF code. Please don't upload AMF code mixed with yours.

The following Gist contains a basic reproduction of this bug, using a base RAML document, and a trivial Extension: https://gist.github.com/brennana/ce8764131fc52d71e0829fb3b19471c7

• What is the expected behavior?
  The examples should not contain duplicated object members within their arrays.

• Please tell us about your environment:

  • AMF Version: tested with 5.4.8 and 5.5.2
  • AMF Distribution: JS
  • Operating System: linux x64