union() doesn't work for context items

[saig0]

Describe the bug The built-in function union doesn't filter duplicates for a list of context items.

union([{x:1},{x:2},{x:1}])

To Reproduce Steps to reproduce the behavior:

1. Evaluate the expression

union([{x:1},{x:2},{x:1}])

2. Verify that the result contains {x:1} twice

Expected behavior The function union() should filter duplicates for a list of context items.

union([{x:1},{x:2},{x:1}])
// [{"x":1},{"x":2}]

Environment

• FEEL engine version: 1.17.3
• Affects:
  • Camunda Automation Platform 7: [7.x]
  • Zeebe broker: 8.3.3