Code:
code
WeldContainer weld = new Weld()
.containerId(id)
.disableDiscovery()
.beanClasses(classes)
.addInterceptor(TransactionalInterceptor.class)
.addBeanClass(TransactionSupport.class)
.extensions(new TransactionExtension(), new OsgiExtension())
.initialize();
code

Exception:
code
java.lang.UnsupportedOperationException
at com.google.common.collect.UnmodifiableIterator.remove(UnmodifiableIterator.java:43)
at com.google.common.collect.TransformedIterator.remove(TransformedIterator.java:53)
at org.jboss.weld.bootstrap.enablement.GlobalEnablementBuilder.filter(GlobalEnablementBuilder.java:296)
at org.jboss.weld.bootstrap.enablement.GlobalEnablementBuilder.createModuleEnablement(GlobalEnablementBuilder.java:239)
at org.jboss.weld.bootstrap.BeanDeployment.createEnablement(BeanDeployment.java:213)
at org.jboss.weld.bootstrap.WeldStartup.startInitialization(WeldStartup.java:389)
at org.jboss.weld.bootstrap.WeldBootstrap.startInitialization(WeldBootstrap.java:76)
at org.jboss.weld.environment.se.Weld.initialize(Weld.java:583)
at org.apache.aries.jpa.cdi.AbstractTest.createCdi(AbstractTest.java:141)
at org.apache.aries.jpa.cdi.AbstractTest.createCdi(AbstractTest.java:129)
at org.apache.aries.jpa.cdi.SimpleTest.test(SimpleTest.java:54)
code

The collection comes from Weld#buildSyntheticBeansXml() which creates immutable collections.