groovy

Covariant return types on overridden methods cause StackOverflowError

Details

  • Type: Bug Bug
  • Status: Open Open
  • Priority: Major Major
  • Resolution: Unresolved
  • Affects Version/s: 1.8.6
  • Fix Version/s: None
  • Component/s: None
  • Labels:
    None
  • Environment:
    OS X 10.6.8. Apple Java
  • Testcase included:
    yes
  • Number of attachments :
    1

Description

Calling this script:

public interface Copyable {

	public Object deepCopy();
}

class GroovyA implements Copyable {

	public GroovyA deepCopy() {
		println("GroovyA.deepCopy()")
		return this;
	}
}

class GroovyB extends GroovyA {

	public GroovyB deepCopy() {
		super.deepCopy();
		println("GroovyB.deepCopy()")
		this
	}
}

new GroovyB().deepCopy()

causes a StackOverError

  1. Java Source File
    Tests.java
    07/Mar/12 10:47 AM
    0.6 kB
    Paul Bennett

Activity

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Jeff Thorn added a comment -

I am seeing the same thing when trying to override ArrayList<E>.iterator(). Since iterator() is a Generic function whose return type could be anything, could Generic return types cause this as well?

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Jeff Thorn added a comment - I am seeing the same thing when trying to override ArrayList<E>.iterator(). Since iterator() is a Generic function whose return type could be anything, could Generic return types cause this as well?

People

  • Assignee:
    Unassigned
    Reporter:
    Paul Bennett
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Dates

  • Created:
    Updated: