This started appearing regularly with the nightlies of May 12 on all
platforms when running MethodHandlesTest. Is there a bug id so I can
mark the failures as known?

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/tmp/jprt/P2/B/001332.et151817/source/src/share/vm/classfile/javaClasses.cpp:48), pid=20914, tid=2
# fatal error: Invalid layout of preloaded class
#

See this page for some examples:

http://sqeweb.sfbay/nfs/results/vm/gtee/JDK7/NIGHTLY/VM/2010-05-18/Main_Baseline/new_unknown_failures.html
The failing test is

java/dyn/MethodHandlesTest.java