As of jdk8-b111 (hs25-b53) we have a regression trying to print the final flags values:

 /java/re/jdk/8/promoted/all/b111/binaries/linux-i586/fastdebug/bin/java -XX:+PrintFlagsFinal -version 2>&1 | more
[Global flags]
    ccstr AbortVMOnException = Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{notproduct}
    ccstr AbortVMOnExceptionMessage = Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{notproduct}
    uintx AdaptiveSizeDecrementScaleFactor = 4 Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{product}
    uintx AdaptiveSizeMajorGCDecayTimeScale = 10 Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{product}
    uintx AdaptiveSizePausePolicy = 0 Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{product}
    uintx AdaptiveSizePolicyCollectionCostMargin = 50 Java HotSpot(TM) Server VM warning: increase O_BUFLEN
in ostream.hpp -- output truncated
{product}

Somehow we get a ostream buffer overflow printing each flag - though the buffer should be 2000 characters and so of ample size.

Only affects fastdebug.