CVS parser breaks with illegal state error

For certain CVS logs, statcvs (20041123-patched) dies with this sort of error:

2004-12-23 11:24:15,097 WARN [sf.statcvs.input.Builder] Revision 1.8.14.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,282 WARN [sf.statcvs.input.Builder] Revision 1.3.14.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,350 WARN [sf.statcvs.input.Builder] Revision 1.1.2.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,351 WARN [sf.statcvs.input.Builder] Revision 1.1.2.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,361 WARN [sf.statcvs.input.Builder] Revision 1.35.2.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,625 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,629 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,630 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,633 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,636 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,638 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,653 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,655 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,658 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,676 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,677 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:15,683 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:17,060 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:17,225 WARN [sf.statcvs.input.Builder] Revision 1.1.1.1 has no main branch - ignoring revision.
2004-12-23 11:24:17,228 WARN [sf.statcvs.input.Builder] Revision 1.1.2.1 has no main branch - ignoring revision.
2004-12-23 11:24:17,276 WARN [sf.statcvs.input.FileBuilder] illegal state in WhatToDoForAVersionChange.txt:1.1
2004-12-23 11:24:17,280 ERROR [action.admin.vcs.AddRepository] Error occurred while obtaining cvs log or parsing the cvs log.
java.lang.NullPointerException
at net.sf.statcvs.input.FileBuilder.createFile(FileBuilder.java:193)
at net.sf.statcvs.input.Builder.createCvsContent(Builder.java:163)
at com.atlassian.jira.vcs.cvsimpl.CvsRepositoryUtilImpl.parseCvsLogs(CvsRepositoryUtilImpl.java:154)
at com.atlassian.jira.web.action.admin.vcs.RepositoryActionSupport.testRepository(RepositoryActionSupport.java:285)
at com.atlassian.jira.web.action.admin.vcs.RepositoryActionSupport.checkRepository(RepositoryActionSupport.java:224)
at com.atlassian.jira.web.action.admin.vcs.RepositoryActionSupport.checkPathsAndRepository(RepositoryActionSupport.java:336)
at com.atlassian.jira.web.action.admin.vcs.RepositoryActionSupport.validateRepositoryParameters(RepositoryActionSupport.java:309)
at com.atlassian.jira.web.action.admin.vcs.AddRepository.doValidation(AddRepository.java:54)
at webwork.action.ActionSupport.validate(ActionSupport.java:371)
at webwork.action.ActionSupport.execute(ActionSupport.java:148)
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:46)
at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:131)
at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:186)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:142)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:58)
at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:36)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:168)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:181)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.seraph.filter.LoginFilter.doFilter(LoginFilter.java:181)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
at com.atlassian.jira.web.filters.ProfilingAndErrorFilter.doFilter(ProfilingAndErrorFilter.java:25)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.jira.web.filters.ActionCleanupDelayFilter.doFilter(ActionCleanupDelayFilter.java:37)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.johnson.filters.JohnsonFilter.doFilter(JohnsonFilter.java:91)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.jira.web.filters.gzip.GzipFilter.doFilter(GzipFilter.java:72)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:36)
at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:246)
at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:164)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:595)