I have just updated my workspace with the changes from JDK7.0-b14 and tried to rebuild it on linux. The build process crashed while processing the directory make/sun/javac/recompile/library:

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# Running javac:
../../../../../build/linux-i586/bin/javac -J-XX:ThreadStackSize=768 -J-client -J-Xmx755m -J-Xms128m -J-XX:PermSize=32m -J-XX:MaxPermSize=160m -classpath ../../../../../build/linux-i586/tmp/java/java.lang/library/newclasses:../../../../../src/share/classes -bootclasspath ../../../../../build/linux-i586/lib/jce.jar -sourcepath ../../../../../build/linux-i586/gensrc:../../../../../src/solaris/classes:../../../../../src/share/classes:../../../../../src/closed/solaris/classes:../../../../../src/closed/share/classes -d ../../../../../build/linux-i586/tmp/java/java.lang/library/newclasses -encoding ascii -source 1.5 -target 5 @../../../../../build/linux-i586/tmp/java/java.lang/.classes.list
#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (554E534146450E43505004DA), pid=7561, tid=16386
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0_01-b06 mixed mode)
# An error report file with more information is saved as hs_err_pid7561.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
/bin/sh: line 1: 7561 Aborted ../../../../../build/linux-i586/bin/javac -J-XX:ThreadStackSize=768 -J-client -J-Xmx755m -J-Xms128m -J-XX:PermSize=32m -J-XX:MaxPermSize=160m -classpath "../../../../../build/linux-i586/tmp/java/java.lang/library/newclasses:../../../../../src/share/classes" -bootclasspath "../../../../../build/linux-i586/lib/jce.jar" -sourcepath "../../../../../build/linux-i586/gensrc:../../../../../src/solaris/classes:../../../../../src/share/classes:../../../../../src/closed/solaris/classes:../../../../../src/closed/share/classes" -d ../../../../../build/linux-i586/tmp/java/java.lang/library/newclasses -encoding ascii -source 1.5 -target 5 @../../../../../build/linux-i586/tmp/java/java.lang/.classes.list
gmake[5]: *** [.compile.classlist] Error 134
gmake[5]: Leaving directory `/export/art/ws/dolphin/make/sun/javac/recompile/library'
gmake[4]: *** [all] Error 1
gmake[4]: Leaving directory `/export/art/ws/dolphin/make/sun/javac/recompile'
gmake[3]: *** [all] Error 1
gmake[3]: Leaving directory `/export/art/ws/dolphin/make/sun/javac'
gmake[2]: *** [all] Error 1
gmake[2]: Leaving directory `/export/art/ws/dolphin/make/java/javac'
gmake[1]: *** [all] Error 1
gmake[1]: Leaving directory `/export/art/ws/dolphin/make/java'
gmake: *** [all] Error 1
gmake: Leaving directory `/export/art/ws/dolphin/make'

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HotSpot log file is placed into the corresponding directory (also attached to the bug report).

The same situation is with another my workspace and workspaces of other AWT members. I tried to change the bootdir to 5u11, 6u1 or 7.0-b10, but always got a crash. I only was able to build the workspace with USE_ONLY_BOOTDIR_TOOLS flag set to TRUE, but the build was broken (java -version crashed). After a build on windows platform, the build is also not workable.