[GROOVY-5599] Assignments to null of variables with generics lead to cryptic errors

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.1
• Component/s: Static Type Checker
• Assignee: Cédric Champeau
• Reporter: Cédric Champeau
• Created: 12/Jul/12 10:49
• Updated: 26/Jul/12 16:49
• Resolved: 12/Jul/12 10:51

Description

Using the following code:

Map<String, Integer> foo = null
Integer result = foo?.get('a')

The type checker returns a cryptic error:

[Static type checking] - Incompatible generic argument types. Cannot assign <unknown parameter type> to: java.util.Map <String, Integer>
 @ line 2, column 13.
               Map<String, Integer> foo = null
               ^