[GROOVY-6321] poor error message when using @Delegate with similar method signatures but having different return types

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 2.2.0-beta-1
• Component/s: xforms
• Assignee: Paul King
• Reporter: Paul King
• Created: 26/Aug/13 06:16
• Updated: 07/Apr/15 19:06
• Resolved: 11/Aug/14 06:09

Description

For this class:

class MapSet {
  @Delegate Set d1 = [5]
  @Delegate Map d2 = [a: 1]
}
println new MapSet()

We get this error:

Cannot override method java.lang.Object remove(java.lang.Object) in java.util.Map with new method having a primitive return type and old method not
. At [-1:-1]  at line: -1, column: -1

Some kind of error is to be expected since with have conflicting primitive "boolean" and "Object" return types but Groovy should attempt to detect this earlier in the @Delegate annotation and give a more meaningful error message.