Using item in tooltip causes infinite loop in Vega graphs

[nyurik]

This Vega graph causes browser crash on tooltip popup. This behavior is not observed in the Vega editor, so it might have been fixed in the more recent version. The bug is a low priority because it would mostly help in some debugging corner cases, but there is no point in using item in production.

{
  $schema: https://vega.github.io/schema/vega/v3.json
  marks: [
    {
      type: arc
      encode: {
        enter: {
          x: {value: 200}
          y: {value: 200}
          outerRadius: {value: 100}
          startAngle: {value: 0}
          endAngle: {signal: "2*PI"}
          tooltip: {signal: "item"}   //  any other value here works fine
        }
      }
    }
  ]
}

[timroes]

Might be solved via #22644

[alexwizp]

The issue was fixed along with updating Vega lib to version 4.2