Escaping \\ with \\\\ not working

[saschahofmann]

I understand I have to escape a single \ with \\\\ but even after doing that I am receiving a an empty chart but no error or warning! Not sure where I am going wrong.

See here for an example editor or copy

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "mark": {"type": "bar", "tooltip": true},
  "encoding": {
    "x": {"field": "x", "type": "ordinal", "axis": {"title": "Location"}},
    "y": {
      "field": "store_i \\\\",
      "type": "quantitative",
      "axis": {"title": "store"}
    }
  },
  "height": "container",
  "width": "container",
  "data": {
    "values": [
      {"x": "Blackpool", "store_i \\": 9},
      {"x": "Blackpool", "store_i \\": 10},
      {"x": "Blackpool", "store_i \\": 11},
      {"x": "Blackpool", "store_i \\": 12},
      {"x": "Edinburgh", "store_i \\": 6},
      {"x": "Edinburgh", "store_i \\": 7},
      {"x": "Edinburgh", "store_i \\": 8},
      {"x": "London", "store_i \\": 1},
      {"x": "London", "store_i \\": 2},
      {"x": "London", "store_i \\": 3},
      {"x": "London", "store_i \\": 4},
      {"x": "London", "store_i \\": 5},
      {"x": "Manchester", "store_i \\": 13},
      {"x": "Manchester", "store_i \\": 14},
      {"x": "Manchester", "store_i \\": 15}
    ]
  }
}

[longxiaofei]

@domoritz Hi, I have also encountered a similar problem. Is there any progress about fixing this bug?