Sort unable to find expressions

[swilly22]

Due to ops migration from inner-plan to outer-plan SORT is unable to locate its expressions.

NOTE: DEBUG ASSERT needs to be ON.

not connected> GRAPH.QUERY g "unwind range(0, 3) as x create ({v:x})"
1) 1) "Nodes created: 4"
   2) "Properties set: 4"
   3) "Cached execution: 0"
   4) "Query internal execution time: 0.408708 milliseconds"

127.0.0.1:6379> GRAPH.QUERY g "CALL {MATCH (a) RETURN a UNION ALL MATCH (a) RETURN a ORDER BY a.v desc} RETURN a"
not connected>