Variables in IN expressions are not parsed

[yamalight]

Either it's me missing something obvious, or in.sparql query is parsed wrongly.
String query has this parts:
FILTER (?a IN (1, 2, 3))
FILTER (?c NOT IN (1, 2, 3))

JSON representation looks like this:

{
  "type": "filter",
  "expression": {
    "type": "operation",
    "operator": "in",
    "args": [
      "\"1\"^^http://www.w3.org/2001/XMLSchema#integer",
      "\"2\"^^http://www.w3.org/2001/XMLSchema#integer",
      "\"3\"^^http://www.w3.org/2001/XMLSchema#integer"
    ]
  }
}

And second one:

{
  "type": "filter",
  "expression": {
    "type": "operation",
    "operator": "notin",
    "args": [
      "\"1\"^^http://www.w3.org/2001/XMLSchema#integer",
      "\"2\"^^http://www.w3.org/2001/XMLSchema#integer",
      "\"3\"^^http://www.w3.org/2001/XMLSchema#integer"
    ]
  }
}

Is it me, or is the variables (?a in case 1, ?c in case 2) are really missing from args?

[RubenVerborgh]

Thanks for reporting, definitely a bug!

[yamalight]

@RubenVerborgh looks like you can expect a number of bugs reported in coming days :)

[RubenVerborgh]

@yamalight Thanks for your help 😄