FULL PRODUCT VERSION :
java version "1.8.0_11"
Java(TM) SE Runtime Environment (build 1.8.0_11-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.11-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.3.9600]

A DESCRIPTION OF THE PROBLEM :
The code in FileTreeWalker,next() should be changed:
                    if (ioe != null) {
                        ioe = e;
                    } else {
                        ioe.addSuppressed(e); // NPE here
                    }


REGRESSION. Last worked in version 7u65

ADDITIONAL REGRESSION INFORMATION:
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Look at the code of the FileTreeWalker.next() method.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
ioe.addSuppressed(e) should be called in the (ioe != null) branch.
ACTUAL -
ioe.addSuppressed(e) is called in when ioe is null.

REPRODUCIBILITY :
This bug can be reproduced always.