While upgrading Drools from version 6.5 to 7.7.0, there is a compile issue in rules that use Date Compare.

e.g. the following rule works fine in 6.5, but errors out in 7.7.0:

when
$inventory : AllocatedInventory(expireDateTime != null && (expireDateTime > Custom.todayPlus(0) && <= Custom.todayPlus(2)) )
…
then
modify(...)

retract($inventory);
end
=======================
Custom function returns Java LocalDateTime (java.util.Date and JodaTime use is deprecated)
The reason it breaks is due to check in function https://github.com/kiegroup/drools/blob/master/drools-compiler/src/main/java/org/drools/compiler/rule/builder/MVELConstraintBuilder.java#L229

Previous version does not have that check. Now, it seems the compiler check compares date value to java.util.Date

Request a feature to allow LocalDateTime date compare