[jira] [Commented] (GROOVY-7750) Instantiation of abstract classes causes unhelpful exception

["Rahul Somasunderam (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-7750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15283382#comment-15283382 ] 

Rahul Somasunderam commented on GROOVY-7750:
--------------------------------------------

I tried this in 2.4.5

{code}
abstract class Foo {}
class Demo {
  @Lazy Foo foo
}
new Demo().foo
{code}

It rightly complains 
{code}
java.lang.InstantiationException
	at Demo.getFoo(ConsoleScript2)
	at ConsoleScript2.run(ConsoleScript2:7)
	at ConsoleScript2.main(ConsoleScript2)
{code}

I believe this can be considered fixed.

> Instantiation of abstract classes causes unhelpful exception
> ------------------------------------------------------------
>
>                 Key: GROOVY-7750
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7750
>             Project: Groovy
>          Issue Type: Improvement
>          Components: groovy-runtime
>    Affects Versions: 2.4.4
>            Reporter: Johann
>            Priority: Minor
>              Labels: usability
>
> Given this code:
> {code:java}
> @Lazy
> Foo foo
> abstract class Foo {}
> {code}
> You'll get:
> {code}
> java.lang.InstantiationException
> 	at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
> 	at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:80)
> 	at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:105)
> 	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60)
> 	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235)
> 	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:239)
> {code}
> This isn't really helpful. If I mistype a method name, Groovy will help me out with suggestions, why not here?



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