PowerMock and Java 8 issue: InterfaceMethodrefInfo cannot be cast to MethodrefInfo

Question

I´m having issues while trying to execute a unit test using PowerMock with Mockito. I need PowerMockito to mock an static method.

These are the versions I´m using:

PowerMock 1.6.2
Mockito 1.10.19
JUnit 4.12
Java 8

When I add the annotation @PrepareForTest(Graph.class) I get the following error:

java.lang.IllegalStateException: Failed to transform class with name     name.of.my.package.GraphUtil. Reason: javassist.bytecode.InterfaceMethodrefInfo cannot be cast to javassist.bytecode.MethodrefInfo

I have read in the official PowerMock Google page that this is related to javassist. But I´m a bit lost and I don´t know how to fix it.

Just in case, I also tried downloading the latest SNAPSHOT of Powermock (1.6.3-SNAPSHOT) but did not work either.

Could anyone help me, please?

Thanks in advance

Well in the issue tracker of javassist there was a bug related (https://issues.jboss.org/browse/JASSIST-220) to that exception and Mr Chiba merged a pull request on the 22 July 2014 (https://github.com/jboss-javassist/javassist/pull/11). My first suggestion would be to make sure you're using the latest version of javassist and if upgrade to latest version. — pabrantes, Jul 07 '15 at 09:29
please add that comment as your own answer and accept it so the question doesn't stay unanswered. Thank you :) — pabrantes, Jul 08 '15 at 15:40

score 24 · Answer 1 · edited May 23 '17 at 12:32

24

Following Francisco González's answer, this is what I had to do :

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>1.5.5</version>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.javassist</groupId>
                <artifactId>javassist</artifactId>
        </exclusion>
    </exclusions>      
</dependency>
<dependency>
    <groupId>org.javassist</groupId>
    <artifactId>javassist</artifactId>
    <version>3.20.0-GA</version>
    <scope>test</scope>
</dependency>

edited May 23 '17 at 12:32

Community

1
1

answered May 13 '16 at 19:24

Prashant

923
1
11
13

5

It *does NOT work* if another dependency of your project depends on `javassist` (e.x. hibernate). You have to remove `test` when you add `javassist` dependency. – Arashsoft Jul 05 '17 at 21:19

score 5 · Accepted Answer · answered Jul 09 '15 at 15:54

5

Yes, that was the problem. PowerMock has a dependency to javassist, so I just had to exclude that transitive dependency in my pom and later include the dependency to the fixed version of javassist. And that worked for me. Thanks!

answered Jul 09 '15 at 15:54

KurroGB

431
2
4
8

7

mention specific versions with problem and fix, and sample pom would help people a lot. – Andrew Mackenzie Mar 28 '16 at 12:06
Actually you do not need to exclude an explicitly overridden transitive dependency in your POM. Probably you do not even need to declare it as a direct dependency at all but use the transitive one, if you version-manage it according to your requirement in your POM's `` section. – kriegaex Jul 10 '20 at 05:28

score 5 · Answer 3 · answered May 18 '18 at 17:02

    <dependency>
        <groupId>org.javassist</groupId>
        <artifactId>javassist</artifactId>
        <version>3.22.0-GA</version>
    </dependency>
    <dependency>
        <groupId>org.powermock</groupId>
        <artifactId>powermock-module-junit4</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.javassist</groupId>
                <artifactId>javassist</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

I'm guessing the point of this is the exclusion? Would be good to add a few words explaining the answer. — Rob Oxspring, May 18 '18 at 17:31

score 0 · Answer 4 · answered Apr 30 '20 at 16:08

A Red Herring?

When I ran into this issue during Android development, I was a single test to an existing file.

Removing the test and re-adding one line at a time, I found that the underlying issue had to do with how TreeSet and its comparator were being instantiated.

YMMV.

PowerMock and Java 8 issue: InterfaceMethodrefInfo cannot be cast to MethodrefInfo

4 Answers4

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