src/java.base/share/classes/java/lang/String.java

*** 1043,1054 ****
              } else {
                  return nonSyncContentEquals((AbstractStringBuilder)cs);
              }
          }
          // Argument is a String
!         if (cs.equals(this))
!             return true;
          // Argument is a generic CharSequence
          char v1[] = value;
          int n = v1.length;
          if (n != cs.length()) {
              return false;
--- 1043,1055 ----
              } else {
                  return nonSyncContentEquals((AbstractStringBuilder)cs);
              }
          }
          // Argument is a String
!         if (cs instanceof String) {
!            return equals((String)cs);
!         }
          // Argument is a generic CharSequence
          char v1[] = value;
          int n = v1.length;
          if (n != cs.length()) {
              return false;