7u-dev PIT build failed on mac-fastdebug: CharsetEncoder.java:973: error: class, interface, or enum expected

JPRT: http://prt-web.us.oracle.com//archive/2014/04/2014-04-02-170450.ssteuck.jdk7u-dev-pit//JobStatus.txt

I have seen this failure before, but it went away after rerun (e.g. 2014-03-12-212843.ssteuck.jdk7u-dev-pit, 2014-03-12-223536.ssteuck.jdk7u-dev-pit)
This time it failed three times in a row.

Error details:
------------------------------------------------------------------------------
macosx_x64_10.7-fastdebug (details from log file)
/net/prt-archiver.us.oracle.com/data/jprt/archive/2014/04/2014-04-02-170450.ssteuck.jdk7u-dev-pit/logs/macosx_x64_10.7-fastdebug.log
http://prt-web.us.oracle.com//archive/2014/04/2014-04-02-170450.ssteuck.jdk7u-dev-pit//logs/macosx_x64_10.7-fastdebug.log
../../../src/solaris/classes/java/lang/Terminator.java
../../../src/solaris/classes/java/util/prefs/FileSystemPreferences.java
../../../src/solaris/classes/java/util/prefs/FileSystemPreferencesFactory.java
../../../src/solaris/classes/sun/misc/FileURLMapper.java
../../../src/solaris/classes/sun/net/www/protocol/file/Handler.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/lang/UNIXProcess.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/DirectByteBuffer.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/HeapByteBuffer.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/HeapCharBuffer.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/charset/CharsetDecoder.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/charset/CharsetEncoder.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/sun/misc/Version.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/sun/util/CoreResourceBundleControl.java
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/sun/util/LocaleDataMetaInfo.java
/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/macosx/classes/java/lang/ClassLoaderHelper.java
/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferences.java
/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFactory.java
/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFile.java
# Running javac:
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/bootjdk/../macosx-x86_64-fastdebug/j2sdk-image/bin/java -XX:-PrintVMOptions -XX:+UnlockDiagnosticVMOptions -XX:-LogVMOutput -Djava.awt.headless=true -Xmx512m -Xms512m -XX:PermSize=32m -XX:MaxPermSize=160m -Xbootclasspath/p:/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64-fastdebug/langtools/dist/bootstrap/lib/javac.jar -jar /opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64-fastdebug/langtools/dist/bootstrap/lib/javac.jar -g -source 7 -target 7 -encoding ascii -Xbootclasspath:/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/classes -sourcepath ../../../src/closed/solaris/classes:../../../src/closed/share/classes:/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc:::/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/macosx/classes:/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/solaris/classes:/opt/jprt/T/P1/170450.ssteuck/s/jdk/src/share/classes -d /opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/classes @/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/tmp/java/java.lang/java/.classes.list.filtered
/opt/jprt/T/P1/170450.ssteuck/s/build/macosx-x86_64/../macosx-x86_64-fastdebug/gensrc/java/nio/charset/CharsetEncoder.java:973: error: class, interface, or enum expected
Java HotSpot(TM) 64-Bit Server VM warning: Performance bug: SystemDictionary lookup_count=17940 lookup_length=20000 average=1.114827 load=0.554014
^
1 error
make[5]: *** [.compile.classlist] Error 1
make[4]: *** [all] Error 1
make[3]: *** [all] Error 1
make[2]: *** [jdk-build] Error 2
make[1]: *** [generic_debug_build] Error 2
make: *** [build_fastdebug_image] Error 2
###########################################################
#
# pwd:
# /opt/jprt/T/P1/170450.ssteuck/s
#
# uname -a:
# Darwin sc21jprtmac07.us.oracle.com 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64
#
# df -k . /tmp /opt/jprt/dist /Users/jprtadm:
# Filesystem 1024-blocks Used Available Capacity Mounted on
# /dev/disk1s2 487546976 28591400 458699576 6% /
# /dev/disk1s2 487546976 28591400 458699576 6% /
# /dev/disk1s2 487546976 28591400 458699576 6% /
# /dev/disk1s2 487546976 28591400 458699576 6% /
#