langtools/src/jdk.dev/share/classes/com/sun/tools/jdeps/JdepsTask.java

*** 552,563 ****
              initialArchives.addAll(classpaths);
          }
          classpaths.addAll(PlatformClassPath.getModules(options.mpath));
          if (options.mpath != null) {
              initialArchives.addAll(PlatformClassPath.getModules(options.mpath));
!         }
          classpaths.addAll(PlatformClassPath.getJarFiles());
          // add all classpath archives to the source locations for reporting
          sourceLocations.addAll(classpaths);
      }
  
      private void findDependencies(boolean apiOnly) throws IOException {
--- 552,564 ----
              initialArchives.addAll(classpaths);
          }
          classpaths.addAll(PlatformClassPath.getModules(options.mpath));
          if (options.mpath != null) {
              initialArchives.addAll(PlatformClassPath.getModules(options.mpath));
!         } else {
              classpaths.addAll(PlatformClassPath.getJarFiles());
+         }
          // add all classpath archives to the source locations for reporting
          sourceLocations.addAll(classpaths);
      }
  
      private void findDependencies(boolean apiOnly) throws IOException {