src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/BaseConfiguration.java

*** 555,565 ****
                      }
                  },
                  new Option(resources, "-linkoffline", 2) {
                      @Override
                      public boolean process(String opt, List<String> args) {
!                         linkOfflineList.add(new Pair<String, String>(args.get(0), args.get(1)));
                          return true;
                      }
                  },
                  new Option(resources, "-nocomment") {
                      @Override
--- 555,565 ----
                      }
                  },
                  new Option(resources, "-linkoffline", 2) {
                      @Override
                      public boolean process(String opt, List<String> args) {
!                         linkOfflineList.add(new Pair<>(args.get(0), args.get(1)));
                          return true;
                      }
                  },
                  new Option(resources, "-nocomment") {
                      @Override