[jira] Updated: (HARMONY-4515) [drlvm][classloader] ClassCastException is thrown with low detail

["Gregory Shimansky (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-4515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gregory Shimansky updated HARMONY-4515:
---------------------------------------

    Assignee: Gregory Shimansky
     Summary: [drlvm][classloader] ClassCastException is thrown with low detail  (was: [drlvm] ClassCastException is thrown with low detail)

> [drlvm][classloader] ClassCastException is thrown with low detail
> -----------------------------------------------------------------
>
>                 Key: HARMONY-4515
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4515
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Vasily Zakharov
>            Assignee: Gregory Shimansky
>         Attachments: H4515.patch, H4515.patch
>
>
> DRLVM, when throws ClassCastException, provides no detail about what were the class being cast and the target for the cast. This makes localizing problems in applications more difficult.
> RI provides information only on the class being cast, and IBM VME provides information on both.
> This situation is not certainly a bug, it may be considered an Improvement or Non-bug difference from RI. However I think DRLVM should better follow the IBM VME behavior, or, at least, RI behavior, to improve its usability.
> Test to reproduce the problem:
> public class Test {
>     public static void main(String[] args) {
>         try {
>             Class c = (Class) (Object) "test";
>         } catch (Throwable e) {
>             e.printStackTrace();
>         }
>     }
> }
> Output on RI:
> java.lang.ClassCastException: java.lang.String
>         at Test.main(Test.java:4)
> Harmony/IBM VME:
> java.lang.ClassCastException: java.lang.String incompatible with java.lang.Class
>         at Test.main(Test.java:4)
> Harmony/DRLVM:
> java.lang.ClassCastException
>         at Test.main(Test.java:4)

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