Excerpt from a jdk7-b34 build log on 32-bit windows:

C:/mksnt/mkdir -p C:/BUILD_AREA/jdk7/build/windows-i586/pack/pack-jre-jars
for i in lib/rt.jar lib/jsse.jar lib/charsets.jar ; do \
    C:/mksnt/ls -l C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/$i | C:/mksnt/awk '{printf("Packing %s %s bytes\n",$9, $5)}' ; \
    C:/mksnt/mkdir -p C:/BUILD_AREA/jdk7/build/windows-i586/pack/pack-jre-jars/`C:/mksnt/dirname $i` ; \
            C:/mksnt/mkdir -p C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/`C:/mksnt/dirname $i` ; \
    C:/BUILD_AREA/jdk7/build/windows-i586/bin/pack200.exe -J-esa -J-ea -J-Xmx512m "--no-gzip" "--config-file=pack.all.properties" --strip-debug --code-attribute=StackMapTable=strip C:/BUILD_AREA/jdk7/build/windows-i586/pack/pack-jre-jars/`C:/mksnt/dirname $i`/`C:/mksnt/basename $i .jar`.pack C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/$i || exit 1 ; \
    rm -f C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/$i ; \
    C:/BUILD_AREA/jdk7/build/windows-i586/bin/unpack200.exe "-v" C:/BUILD_AREA/jdk7/build/windows-i586/pack/pack-jre-jars/`C:/mksnt/dirname $i`/`C:/mksnt/basename $i .jar`.pack C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/$i || exit 1 ; \
done
Packing C:/BUILD_AREA/jdk7/build/windows-i586/j2re-image/lib/rt.jar 46327401 bytes
gnumake[3]: *** [pack-jars] Error 1
gnumake[3]: Leaving directory `C:/BUILD_AREA/jdk7/install/make/pack'
gnumake[2]: *** [pack-jre] Error 2
gnumake[2]: Leaving directory `C:/BUILD_AREA/jdk7/install/make/pack'
gnumake[1]: *** [all] Error 1
gnumake[1]: Leaving directory `C:/BUILD_AREA/jdk7/install/make'
gnumake: *** [install-build] Error 2