java version "1.3.1_19"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_19-b02)
Java HotSpot(TM) Client VM (build 1.3.1_19-b02, mixed mode)

TEST="javasoft.sqe.tests.vm.classfmt.ins.instr_018.instr_01801m1.instr_01801m1"
ENVIRONMENT=JCK-runtime-13a

See attached vm_instr_018.sh to reproduce the failure.
You need only to change JCK to your local JCK-runtime-13a testsuite and LD_LIBRARY_PATH to which-ever OS you are running on.
See also attached .jtr for full javatest report.
I have also attached the .java source file for your convenience.

This same test passes ok with 1.3.1_19 build1. A clear regression introduced in b2.

Platforms tested:
Sparc 8 and Windows XP Home.

Exception thrown:

java version "1.3.1_19"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_19-b02)
Java HotSpot(TM) Client VM (build 1.3.1_19-b02, mixed mode)

test instr_01801m1 failed with unexpected loading exception: java.lang.ClassFormatError: javasoft/sqe/tests/vm/classfmt/ins/instr_018/instr_01801m1/instr_01801m1n (Field "sa255" has illegal signature "[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[")