$sort() comparator violates Java Comparator contract, causing TimSort failure with equal values

[85C77EF3-E4C7-4251-A987-02CB8DD42971]

Description:

The $sort() function's comparator wrapper maps boolean results incorrectly, violating Java's Comparator contract. This causes TimSort to throw "Comparison method violates its general contract!" when the array contains equal values.

Reproduction:

$sort([
    {"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0}, 
    {"v":1},
    {"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},
    {"v":2},
    {"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},
    {"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},{"v":0},
    {"v":3} 
], function($a, $b) { $a.v > $b.v })

Result:

java.lang.IllegalArgumentException: Comparison method violates its general contract!
  at java.util.TimSort.mergeLo(TimSort.java:781)
  at java.util.TimSort.mergeAt(TimSort.java:518)
  at java.util.TimSort.mergeForceCollapse(TimSort.java:461)
  at java.util.TimSort.sort(TimSort.java:254)
  at java.util.Arrays.sort(Arrays.java:1233)
  at java.util.ArrayList.sort(ArrayList.java:1721)
  at com.dashjoin.jsonata.Functions.sort(Functions.java:1979)