Recent upgrade caused this error to occur in a job that sends email notifications. Disabling email
notification eliminates problem.

java.lang.ClassCastException: hudson.plugins.perforce.PerforceSCM
at hudson.scm.SubversionChangeLogSet$LogEntry.preparePath(SubversionChangeLogSet.java:175)
at hudson.scm.SubversionChangeLogSet$LogEntry.access$200(SubversionChangeLogSet.java:118)
at hudson.scm.SubversionChangeLogSet$LogEntry$1.get(SubversionChangeLogSet.java:166)
at hudson.scm.SubversionChangeLogSet$LogEntry$1.get(SubversionChangeLogSet.java:164)
at java.util.AbstractList$Itr.next(AbstractList.java:422)
at hudson.maven.MavenModuleSetBuild$1.isDescendantOf(MavenModuleSetBuild.java:198)
at hudson.maven.MavenModuleSetBuild$1.<init>(MavenModuleSetBuild.java:168)
at hudson.maven.MavenModuleSetBuild.getChangeSetFor(MavenModuleSetBuild.java:162)
at hudson.maven.FilteredChangeLogSet.<init>(FilteredChangeLogSet.java:52)
at hudson.maven.MavenBuild.getChangeSet(MavenBuild.java:163)
at hudson.model.AbstractBuild.hasParticipant(AbstractBuild.java:225)
at hudson.model.AbstractProject.hasParticipant(AbstractProject.java:903)
at hudson.model.User.getProjects(User.java:369)
at
hudson.tasks.MailAddressResolver$DefaultAddressResolver.findMailAddressFor(MailAddressResolver.ja
va:148)
at hudson.tasks.MailAddressResolver.resolve(MailAddressResolver.java:86)
at hudson.tasks.Mailer$UserProperty.getAddress(Mailer.java:434)
at hudson.tasks.MailSender.buildCulpritList(MailSender.java:337)
at hudson.tasks.MailSender.createEmptyMail(MailSender.java:318)
at hudson.tasks.MailSender.createBackToNormalMail(MailSender.java:150)
at hudson.tasks.MailSender.getMail(MailSender.java:141)
at hudson.tasks.MailSender.execute(MailSender.java:81)
at hudson.tasks.Mailer.perform(Mailer.java:95)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:379)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:367)
at hudson.model.Build$RunnerImpl.post2(Build.java:183)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:352)
at hudson.model.Run.run(Run.java:969)
at hudson.model.Build.run(Build.java:112)
at hudson.model.ResourceController.execute(ResourceController.java:93)
at hudson.model.Executor.run(Executor.java:116)