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From Jérôme Leroux (JIRA) <j...@apache.org>
Subject [jira] [Commented] (BCEL-188) Invalid verification of the returned value of a method
Date Tue, 10 Mar 2015 08:38:38 GMT

    [ https://issues.apache.org/jira/browse/BCEL-188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354545#comment-14354545
] 

Jérôme Leroux commented on BCEL-188:
------------------------------------

The invalid classfiles defined in these tests cannot be generated from Java source. Currently,
to produce them I modify a valid classfile with a disassembler.
This method is not the best to obtain something documented well :-(
[~ebourg] suggests in BCEL-184 to use Jasmin to generate these classfiles.

> Invalid verification of the returned value of a method
> ------------------------------------------------------
>
>                 Key: BCEL-188
>                 URL: https://issues.apache.org/jira/browse/BCEL-188
>             Project: Commons BCEL
>          Issue Type: Bug
>          Components: Verifier
>            Reporter: Jérôme Leroux
>             Fix For: 6.0
>
>         Attachments: BCEL-188-2.patch, BCEL-188-3.patch, BCEL-188-3.zip, BCEL-188.patch
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> The bytecode generated from the following code produces a verification error:
> {code:java}
>     public static Object test(){
>         return new Object();
>     }
> {code}
> Here is the error message:
> {quote}
> Pass 3b, method number 2 \['public static Object test()'\]:
> VERIFIED_REJECTED
> Constraint violated in method 'public static Object test()':
> Returned type void does not match Method's return type java.lang.Object
> {quote}
> The problem also occurs for all kind of returned value: primitive types (byte, int, etc.),
array , null, object, …



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