[GROOVY-7507] Cannot assign value of type java.lang.Object in ternary operator with null

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.3, 2.4.4
• Fix Version/s: 4.0.0-alpha-3, 3.0.11, 2.5.19
• Component/s: Static Type Checker
• Assignee: Eric Milles
• Reporter: Mauro Molinari
• Created: 17/Jul/15 07:13
• Updated: 10/Feb/23 21:40
• Resolved: 03/Sep/22 00:36

Description

This seems to be something like a regression of GROOVY-5734.

The following fails in Groovy 2.4.3/2.4.4, while it didn't fail in Groovy 2.3.11:

Bar.java

package test2;

public class Bar {
}

Foo.java

package test2;

public class Foo {
	private Bar bar;
	
	public void setBar(Bar bar) {
		this.bar = bar;
	}
	
	public Bar getBar() {
		return bar;
	}
}

Test.groovy

package test2

import groovy.transform.CompileStatic;

@CompileStatic
public class Test {
	void test() {
		boolean check = true
		Foo foo = new Foo()
		foo.bar = check? new Bar(): null
	}
}

The assignment to foo.bar fails with:Cannot assign value of type java.lang.Object to variable of type test2.Bar.

The same heppens if Foo is written in Groovy instead of Java.

Issue Links

• is related to: GROOVY-9972 LUB does not work correctly in case of ternary operator