VerifyError when deploying application containing Struts 1.2.4 and StrutsEL 1.2.9 on EAP 6

Issue

We receive the following error when deploying out application on EAP 6. The application has Struts 1.2.4 and Struts EL 1.2.9 packaged in it.

ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC000001: Failed to start service jboss.deployment.unit."myapp.war".POST_MODULE: org.jboss.msc.service.StartException in service jboss.deployment.unit."myapp.war".POST_MODULE: JBAS018733: Failed to process phase POST_MODULE of deployment "myapp.war"
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:123) [jboss-as-server-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA-redhat-1.jar:1.0.2.GA-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA-redhat-1.jar:1.0.2.GA-redhat-1]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.7.0_09]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.7.0_09]
    at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_09]
Caused by: java.lang.RuntimeException: JBAS018757: Error getting reflective information for class org.apache.strutsel.taglib.html.ELCancelTag with ClassLoader ModuleClassLoader for Module "deployment.myapp.war:main" from Service Module Loader
    at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:72) [jboss-as-server-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
    at org.jboss.as.ee.metadata.MethodAnnotationAggregator.runtimeAnnotationInformation(MethodAnnotationAggregator.java:58)
    at org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.handleAnnotations(InterceptorAnnotationProcessor.java:85)
    at org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.processComponentConfig(InterceptorAnnotationProcessor.java:70)
    at org.jboss.as.ee.component.deployers.InterceptorAnnotationProcessor.deploy(InterceptorAnnotationProcessor.java:55)
    at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:116) [jboss-as-server-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
    ... 5 more
Caused by: java.lang.VerifyError: (class: org/apache/strutsel/taglib/html/ELCancelTag, method: evaluateExpressions signature: ()V) Incompatible object argument for function call
    at java.lang.Class.getDeclaredFields0(Native Method) [rt.jar:1.7.0_09]
    at java.lang.Class.privateGetDeclaredFields(Class.java:2308) [rt.jar:1.7.0_09]
    at java.lang.Class.getDeclaredFields(Class.java:1760) [rt.jar:1.7.0_09]
    at org.jboss.as.server.deployment.reflect.ClassReflectionIndex.<init>(ClassReflectionIndex.java:57) [jboss-as-server-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
    at org.jboss.as.server.deployment.reflect.DeploymentReflectionIndex.getClassIndex(DeploymentReflectionIndex.java:68) [jboss-as-server-7.1.2.Final-redhat-1.jar:7.1.2.Final-redhat-1]
    ... 10 more