[GROOVY-10635] Method references not working for record components in dynamic code

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.3
• Assignee: Paul King
• Reporter: Paul King
• Created: 23/May/22 12:12
• Updated: 24/Jul/22 12:16
• Resolved: 24/May/22 02:45

Description

The following example currently fails.

record Bar(String name) { }

def bars = [new Bar(name: 'A'), new Bar(name: 'B')]
assert bars.stream().map(Bar::name).toList() == ['A', 'B']

The error message is:

java.lang.IllegalArgumentException: Can not set final java.lang.String field Bar.name to java.lang.Class

This is because the metaclass is picking the private field as a property ahead of the same-named accessor method.

Workaround is to use @CompileStatic.

Issue Links

• links to: GitHub Pull Request #1721