NPE when restarting repository

After creating a new repository in Fisheye, I get the following stack trace when attempting to restart the repository.

While creating the repository, I modified its trunk/tag/branch structure. I used "Test Path" to verify my regex patterns, and was presented with an error page stating that my regex was incorrectly formatted. I edited the repository and fixed the regex error. Now, I cannot restart the repository or re-index it. Its status is just "Enabled:" and the only operation available on the main admin page is "View". I have the feeling that the incorrect regex caused the repository to be created in some invalid state. Restarting Fisheye seems to have alleviated the issue – at least, it is scanning the repository now and I can stop/start it.

WARN - problem starting/stopping repository
java.lang.NullPointerException
at com.cenqua.fisheye.web.admin.actions.ManageRepositoryAction.execute(ManageRepositoryAction.java:52)
at com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:283)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:166)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.cenqua.fisheye.web.admin.interceptors.LoginInterceptor.intercept(LoginInterceptor.java:49)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:272)
at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:237)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1149)
at com.cenqua.fisheye.web.filters.TotalityFilter.doFilter(TotalityFilter.java:123)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1141)
at com.cenqua.fisheye.web.util.GZIPFilter.doFilter(GZIPFilter.java:25)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1141)
at com.cenqua.fisheye.web.filters.UpfrontFilter.doFilter(UpfrontFilter.java:37)
at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1141)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:285)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)