Description Noopur Gupta 2014-06-05 05:58:34 EDT

package bug;

@FunctionalInterface
interface FI {
	int foo (int x);
}

class T {
	private void foo() {
		FI fi1 = a -> { // [1]-caret before 'a'. [2]-select 'a'
			int x = a;
			return a;
		};
		FI fi2 = (int a) -> { // [3]
			int x = fi1.foo(0);
			return a;
		};
	}

	private void bar(FI fi) {}
}
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In the above example, invoke "Convert local variable to field" via Refactor menu.
[1] converts 'fi1' to field.
[2] & [3] result in the following exception:

java.lang.reflect.InvocationTargetException
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:423)
	at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.run(RefactoringWizardDialog2.java:331)
	at org.eclipse.ltk.ui.refactoring.RefactoringWizard.internalPerformFinish(RefactoringWizard.java:637)
	at org.eclipse.ltk.ui.refactoring.UserInputWizardPage.performFinish(UserInputWizardPage.java:153)
	at org.eclipse.ltk.ui.refactoring.RefactoringWizard.performFinish(RefactoringWizard.java:710)
	at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.okPressed(RefactoringWizardDialog2.java:455)
	at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:466)
...
Caused by: org.eclipse.core.runtime.AssertionFailedException: assertion failed: 
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:110)
	at org.eclipse.core.runtime.Assert.isTrue(Assert.java:96)
	at org.eclipse.jdt.internal.corext.refactoring.code.PromoteTempToFieldRefactoring.addLocalDeclarationRemoval(PromoteTempToFieldRefactoring.java:815)
	at org.eclipse.jdt.internal.corext.refactoring.code.PromoteTempToFieldRefactoring.createChange(PromoteTempToFieldRefactoring.java:541)