FULL PRODUCT VERSION :
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
StringObject.replaceAll(the_regex_here, "\\");

throwing exception and instead of replacing the thing.
NOTE: it's only happening when there's only single \ characters in the replaceWith field.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
// THE LAST TWO STATEMENTS PRODUCES THE EXCEPTION

public class RegexCheck {
public static void main(String[] args) {
System.out.println("abc\\\\def".replaceAll("\\\\", "."));
System.out.println("abc..def".replaceAll("\\.\\.", "."));
System.out.println("abc..def".replaceAll("\\.\\.", "\\*"));
System.out.println("abc..def".replaceAll("\\.\\.", "\\\\"));
System.out.println("abc..def".replaceAll("\\.\\.", "\\"));
System.out.println("abc\\\\def".replaceAll("\\\\", "\\"));
}
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
abc..def
abc.def
abc*def
abc\def
abc\def
ACTUAL -
abc..def
abc.def
abc*def
abc\def
Exception in thread "main" java.lang.IllegalArgumentException: character to be escaped is missing
        at java.util.regex.Matcher.appendReplacement(Unknown Source)
        at java.util.regex.Matcher.replaceAll(Unknown Source)
        at java.lang.String.replaceAll(Unknown Source)
        at RegexCheck.main(RegexCheck.java:7)

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.IllegalArgumentException: character to be escaped is missing
        at java.util.regex.Matcher.appendReplacement(Unknown Source)
        at java.util.regex.Matcher.replaceAll(Unknown Source)
        at java.lang.String.replaceAll(Unknown Source)
        at RegexCheck.main(RegexCheck.java:7)

REPRODUCIBILITY :
This bug can be reproduced always.

SUPPORT :
YES