garbled parse in erroneous grammar

[guitarvydas]

I load the following grammar and test into ohm-editor and set the start rule to "KVkeep_inputport". The parse fails. When I click on the "Explain parse" option, the parse tree shows garbled information (scroll to far right).

background: I am trying to figure out why the comma in ,..."contents":{...} is disappearing when I set the start rule to "object". [This probably has to do with a misunderstanding I have about space-skipping and shortest vs. longest match, but, it doesn't change the fact that the editor parse appears garbled].

grammar:

keep {
  main = item+
  item =
    | rootArray -- root
    | "{" spaces item+ "}" -- braces
    | "[" spaces item+ "]" -- square
    | ~"{" ~"}" ~"[" ~"]" any
  rootArray = "[" object+ "]"
  object = "{" kvPair+ "}"
  kvPair = 
    | applySyntactic<KVkeep> -- keep
    | string ":" other+ -- ignore
    | space -- separator

  KVkeep =
    | Key<"attributes"> "{" ID Key<"kind"> value<"inputgate"> (#other)* "}"-- inputgate
    | Key<"attributes"> "{" ID Key<"kind"> value<"inputport"> (#other)* "}" -- inputport
    | Key<"attributes"> "{" ID Key<"kind"> value<"outputgate"> (#other)* "}" -- outputgate
    | Key<"attributes"> "{" ID Key<"kind"> value<"outputport"> (#other)* "}" -- outputport
    | Key<"attributes"> "{" ID Key<"kind"> value<"part"> (#other)* "}" -- part
    | Key<"attributes"> "{" ID Key<"kind"> value<"wire"> (#other)* "}" -- wire


  other =
    | "{" ws other+ "}" ws -- braces
    | "[" ws other+ "]" ws -- square
    | ~"{" ~"}" ~"[" ~"]" any -- default

  ID = Key<"id"> string

  Key<s> = dq s dq ":"
  value<s> = dq s dq
  string = dq (~dq any)* dq
  dq = "\""
  space += ","
  ws = spaces
}

test:

"attributes": {
              "id": "3",
              "kind": "inputport",
              "label": "pin",
              "parent": "2"
            },
            "contents": {
              "boundingbox": [
                -16.75,
                27.5,
                36.75,
                25
              ]
            }