[GROOVY-4046] 1 == new Object() throws ClassCastException

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.7.0
• Fix Version/s: 1.6.8, 1.7.1, 1.8-beta-1
• Environment: tested for 1.7.0 and 1.6.0
• Assignee: Roshan Dawrani
• Reporter: Armin Weisser
• Created: 10/Feb/10 08:05
• Updated: 19/Jul/16 11:34
• Resolved: 10/Feb/10 13:23

Description

Example 1:

assertFalse(new Object() == 1) // this is ok
assertFalse(1 == new Object()) // this throws a ClassCastException, because Groovy redirects the call to java.lang.Integer.compareTo(Integer i)

Example 2:

enum MyEnum

{ A, B, C }

assertFalse(new Object() == MyEnum.A) // this is ok
assertFalse(MyEnum.A == new Object()) // this throws a ClassCastException, because Groovy redirects the call to java.lang.Enum.compareTo(E e) where E extends java.lang.Enum<E>

Issue Links

• relates to: GROOVY-7876 ClassCastException when calling DefaultTypeTransformation#compareEqual