FULL PRODUCT VERSION :
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
macOS Sierra 10.12.5

A DESCRIPTION OF THE PROBLEM :
Given a pattern "$" that does not specify Pattern.MULTILINE flag, I would expect it to match only once, no matter the test string. It should match only at the end of the full string, including newlines.

But matching against the simple string "\n" matches twice.



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Execute following code:

    public static void main(String[] args) {
      Pattern p = Pattern.compile("$");
      Matcher m = p.matcher("\n");
      int count = 0;
      while (m.find()) {
          count++;
      }
      System.out.println(String.format("Matched %d times.", count));
    }



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I would expect it to print "Matched 1 times".
ACTUAL -
It prints "Matched 2 times".

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

    public static void main(String[] args) {
      Pattern p = Pattern.compile("$");
      Matcher m = p.matcher("\n");
      int count = 0;
      while (m.find()) {
          count++;
      }
      System.out.println(String.format("Matched %d times.", count));
    }

---------- END SOURCE ----------