src/java.base/share/classes/java/io/LineNumberReader.java

*** 1,7 ****
  /*
!  * Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 259,268 ****
--- 259,273 ----
       * @throws  IOException
       *          If an I/O error occurs
       */
      public void mark(int readAheadLimit) throws IOException {
          synchronized (lock) {
+             // If the most recently read character is '\r', then increment the
+             // read ahead limit as in this case if the next character is '\n',
+             // two characters would actually be read by the next read().
+             if (skipLF)
+                 readAheadLimit++;
              super.mark(readAheadLimit);
              markedLineNumber = lineNumber;
              markedSkipLF     = skipLF;
          }
      }