String.equals(null) is fast enough...

core/src/main/java/hudson/cli/CliCrumbExclusion.java

@@ -43,7 +43,7 @@ public class CliCrumbExclusion extends CrumbExclusion {
     @Override
     public boolean process(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
         String pathInfo = request.getPathInfo();
-        if (pathInfo != null && "/cli".equals(pathInfo)) {
+        if ("/cli".equals(pathInfo)) {
             chain.doFilter(request, response);
             return true;
         }

core/src/main/java/hudson/tasks/ArtifactArchiver.java

@@ -327,7 +327,7 @@ public class ArtifactArchiver extends Recorder implements SimpleBuildStep {
                 return FormValidation.ok();
             }
             // defensive approach to remain case sensitive in doubtful situations
-            boolean bCaseSensitive = caseSensitive == null || !"false".equals(caseSensitive);
+            boolean bCaseSensitive = !"false".equals(caseSensitive);
             return FilePath.validateFileMask(project.getSomeWorkspace(), value, bCaseSensitive);
         }