Issue with filters and projections

[springcomp]

Most implementations seems to have the following issue:

Given the following JSON:

[
  {
    "stack": "",
    "branch": [
      "one/",
      "two/"
    ]
  },
  { "branch": ["three/", "four/"]}
]

The following expression yields an incorrect result:

• [?stack==''].branch[?starts_with(@, 'one')] -> invalid-type

In contrast, the following similar expression returns the expected result:

• [].branch[?starts_with(@, 'one')] -> [ [ "one/" ], [] ]

Please consider adding a compliance test and fixing the libraries.