[GROOVY-9814] Method reference doesn't accept subtypes of argument

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.6
• Fix Version/s: 3.0.7, 4.0.0-alpha-2
• Component/s: Compiler
• Assignee: Eric Milles
• Reporter: Christopher Smith
• Created: 13/Nov/20 01:02
• Updated: 07/Dec/20 22:09
• Resolved: 28/Nov/20 03:09

Description

When using a method reference such as HasId::getId, the compiler implements the request by generating a MethodClosure. However, the closure accepts only the exact type of the reference, not subtypes. All compile-time checks pass, but the closure throws MissingMethodException at runtime with the message

No signature of method: org.codehaus.groovy.runtime.MethodClosure.getId() is applicable for argument types: (com.example.ClassWithId)