[GROOVY-9982] Can't assign a field with the result of a method call of the same name from a base class

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.7
• Fix Version/s: 2.5.15, 3.0.8, 4.0.0-alpha-3
• Assignee: Eric Milles
• Reporter: Benedikt Ritter
• Created: 12/Mar/21 14:06
• Updated: 02/May/21 09:16
• Resolved: 12/Mar/21 17:23

Description

Having a method in a base class and using that method in an assignment in an inheriting class to assign a field of the same name as that method causes a NullPointerException.

Try executing the attached script with Groovy 3.0.7. It will yield:

❯ groovy test.groovy
Caught: java.lang.NullPointerException
java.lang.NullPointerException
	at Child.setup(test.groovy:11)
	at Child$setup.call(Unknown Source)
	at test.run(test.groovy:16)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

As a work around the method call to foo() can explicitly be prefixed with `super.`