IllegalStateException when compiling with java-power-assert

[RichardBradley]

I'm trying to use java-power-assert on my Java 8 project.
The project has a few other annotation processors active.

I can't post the code here, but I can do any follow up investigation that might be necessary.

Here's the error I'm getting from mvn test:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project my-project: Compilation failure
[ERROR] Failure executing javac, but could not parse the error:
[ERROR]
[ERROR]
[ERROR] An annotation processor threw an uncaught exception.
[ERROR] Consult the following stack trace for details.
[ERROR] java.lang.IllegalStateException
[ERROR] at com.sun.tools.javac.util.Context.checkState(Context.java:225)
[ERROR] at com.sun.tools.javac.util.Context.get(Context.java:146)
[ERROR] at com.sun.tools.javac.tree.TreeMaker.instance(TreeMaker.java:55)
[ERROR] at org.powerassert.javac.JavacPowerAssertGenerator.scan(JavacPowerAssertGenerator.java:59)
[ERROR] at org.powerassert.PowerAssertProcessor.process(PowerAssertProcessor.java:54)
[ERROR] at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794)
[ERROR] at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705)
[ERROR] at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91)
[ERROR] at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035)
[ERROR] at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176)
[ERROR] at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170)
[ERROR] at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856)
[ERROR] at com.sun.tools.javac.main.Main.compile(Main.java:523)
[ERROR] at com.sun.tools.javac.main.Main.compile(Main.java:381)
[ERROR] at com.sun.tools.javac.main.Main.compile(Main.java:370)
[ERROR] at com.sun.tools.javac.main.Main.compile(Main.java:361)
[ERROR] at com.sun.tools.javac.Main.compile(Main.java:74)

Can you tell what's wrong from this info alone?

How can I gather more information to diagnose this problem? There doesn't seem to be enough info here to diagnose yet.

Thanks,

Rich