After upgrading to version 1.548, I get a NullPointerException when opening views that have <filterExecutors>true</filterExecutors>. The result page has the following exception details:

java.lang.NullPointerException
at hudson.model.View.isRelevant(View.java:451)
at hudson.model.View.getComputers(View.java:439)
at sun.reflect.GeneratedMethodAccessor332.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
at groovy.lang.MetaClassImpl$GetBeanMethodMetaProperty.getProperty(MetaClassImpl.java:3500)
at org.codehaus.groovy.runtime.callsite.GetEffectivePojoPropertySite.getProperty(GetEffectivePojoPropertySite.java:61)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:227)
at jenkins.widgets.ExecutorsWidget.index.run(index.groovy:5)
at org.kohsuke.stapler.jelly.groovy.GroovierJellyScript.run(GroovierJellyScript.java:69)
at org.kohsuke.stapler.jelly.groovy.GroovierJellyScript.run(GroovierJellyScript.java:62)
at org.kohsuke.stapler.jelly.IncludeTag.doTag(IncludeTag.java:147)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:269)
... 87 more