src/java.base/share/classes/sun/util/locale/provider/ResourceBundleProviderSupport.java

*** 107,125 ****
              return null;
          }
  
          PrivilegedAction<InputStream> pa = () -> {
              try {
!                 InputStream in = module.getResourceAsStream(resourceName);
!                 if (in == null) {
!                     // for migration, find .properties bundle from unnamed module
!                     Module unnamed = module.getClassLoader() != null
!                             ? module.getClassLoader().getUnnamedModule()
!                             : BootLoader.getUnnamedModule();
!                     return unnamed.getResourceAsStream(resourceName);
!                 }
!                 return in;
              } catch (IOException e) {
                  throw new UncheckedIOException(e);
              }
          };
          try (InputStream stream = AccessController.doPrivileged(pa)) {
--- 107,117 ----
              return null;
          }
  
          PrivilegedAction<InputStream> pa = () -> {
              try {
!                 return module.getResourceAsStream(resourceName);
              } catch (IOException e) {
                  throw new UncheckedIOException(e);
              }
          };
          try (InputStream stream = AccessController.doPrivileged(pa)) {