I reproduced the "ant test" error on SuSE Linux 10.1 platform with IBM JDK 5.0, but the print out is different, I'd like to upload the file for your reference.

Environment:
Linux SUSE-sma 2.6.16.54-0.2.5-bigsmp #1 SMP Mon Jan 21 13:29:51 UTC 2008 i686 i686 i386 GNU/Linux
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build pxi32devifx-20071025 (SR6b))
IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux x86-32 j9vmxi3223-20071005 (JIT enabled)
J9VM - 20071004_14218_lHdSMR
JIT - 20070820_1846ifx1_r8
GC - 200708_10)
JCL - 20071025

Not working for me either, but I seem to get a different error:

pldms@kessel:~/Development/CVS-Other/jruby$ uname -a
Linux kessel 2.6.22-14-generic #1 SMP Tue Feb 12 07:42:25 UTC 2008 i686 GNU/Linux
pldms@kessel:~/Development/CVS-Other/jruby$ java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build pxi3260-20071123_01)
IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux x86-32 jvmxi3260-20071121_15015 (JIT enabled)
J9VM - 20071121_015015_lHdSMR
JIT  - r9_20071121_1330
GC   - 20071031_AA)
JCL  - 20071118_01
pldms@kessel:~/Development/CVS-Other/jruby$ echo $JAVA_HOME
/home/pldms/Applications/ibm-java-i386-60
pldms@kessel:~/Development/CVS-Other/jruby$ ant clean jar
Buildfile: build.xml

init:

clean:
   [delete] Deleting directory /home/pldms/Development/CVS-Other/jruby/docs/api

init:

jar:

jar-jruby:

init:

extract-rdocs:

prepare:
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/build/classes
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/build/classes/jruby
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/build/classes/test
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/build/test-results
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/build/test-results/html
    [mkdir] Created dir: /home/pldms/Development/CVS-Other/jruby/docs/api

compile.tasks:
     [copy] Copying 8 files to /home/pldms/Development/CVS-Other/jruby/build/classes/jruby
     [copy] Copying 21 files to /home/pldms/Development/CVS-Other/jruby/build/classes/jruby/builtin
     [copy] Copying 1 file to /home/pldms/Development/CVS-Other/jruby/build/classes/jruby

check-for-optional-java4-packages:

check-for-optional-packages:

compile-jruby:
    [javac] Compiling 636 source files to /home/pldms/Development/CVS-Other/jruby/build/classes/jruby
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.

compile:

generate-method-classes:
    [touch] Creating /home/pldms/Development/CVS-Other/jruby/build/__empty.rb
     [java] Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Array index out of range: -1
     [java]     at org.jruby.runtime.ThreadContext.getCurrentFrame(ThreadContext.java:350)
     [java]     at org.jruby.runtime.ThreadContext.getFrameSelf(ThreadContext.java:372)
     [java]     at org.jruby.RubyClass.invoke(RubyClass.java:234)
     [java]     at org.jruby.javasupport.util.RuntimeHelpers.invokeAs(RuntimeHelpers.java:331)
     [java]     at org.jruby.runtime.Dispatcher$DefaultDispatcher.callMethod(Dispatcher.java:17)
     [java]     at org.jruby.RubyClass.invoke(RubyClass.java:224)
     [java]     at org.jruby.javasupport.util.RuntimeHelpers.invoke(RuntimeHelpers.java:339)
     [java]     at org.jruby.RubyObject.callMethod(RubyObject.java:485)
     [java]     at org.jruby.RubyObject.equals(RubyObject.java:273)
     [java]     at java.util.WeakHashMap.put(Unknown Source)
     [java]     at org.jruby.util.collections.WeakHashSet.add(WeakHashSet.java:44)
     [java]     at org.jruby.RubyClass.addSubclass(RubyClass.java:357)
     [java]     at org.jruby.RubyClass.<init>(RubyClass.java:175)
     [java]     at org.jruby.RubyClass.newClass(RubyClass.java:186)
     [java]     at org.jruby.RubyClass.newClass(RubyClass.java:193)
     [java]     at org.jruby.Ruby.defineClassUnder(Ruby.java:656)
     [java]     at org.jruby.Ruby.defineClass(Ruby.java:612)
     [java]     at org.jruby.RubyThread.createThreadClass(RubyThread.java:119)
     [java]     at org.jruby.Ruby.initCore(Ruby.java:907)
     [java]     at org.jruby.Ruby.bootstrap(Ruby.java:852)
     [java]     at org.jruby.Ruby.init(Ruby.java:828)
     [java]     at org.jruby.Ruby.newInstance(Ruby.java:158)
     [java]     at org.jruby.Main.run(Main.java:121)
     [java]     at org.jruby.Main.run(Main.java:88)
     [java]     at org.jruby.Main.main(Main.java:79)

BUILD FAILED
/home/pldms/Development/CVS-Other/jruby/build.xml:290: The following error occurred while executing this line:
/home/pldms/Development/CVS-Other/jruby/build.xml:185: The following error occurred while executing this line:
/home/pldms/Development/CVS-Other/jruby/build.xml:156: Java returned: 1

Total time: 23 seconds

Fix for 1.1.1.

I made a change that got this working on IBM JDKs...could you retry? There were other reasons the tests didn't pass, but I didn't look into those yet.

The fix I made appears to let JRuby start up and run under IBM's JDKs. If there are additional issues running under IBM JDK (and there certainly are, since ant test does not pass) they should be filed separately.

I got the same "BUILD FAILED" error message when running ant test from the trunk I just checked out from http://svn.codehaus.org/jruby/trunk/jruby

I was running eclipse v3.4.1 with jdk1.6.0_10.

When I reset the eclipse (Window | Preferences... | Java | Installed JREs) to the version used by my Rational Software Architect v7.5 (J2RE 1.6.0 IBM J9 2.4 Windows 2000 x86-32 jvmwi3260-20080816_22093) it worked:

<pre>
Buildfile: C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build.xml
init:
jar:
init:
extract-rdocs:
prepare:
compile-tasks:
[copy] Copying 18 files to C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build\classes\jruby\builtin
[copy] Copying 1 file to C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build\classes\jruby
compile-annotation-binder:
check-for-optional-java4-packages:
check-for-optional-packages:
compile-jruby:
compile:
generate-method-classes:
gmc_internal:
generate-unsafe:
gu_internal:
[echo] Generating Unsafe impl...
jar-jruby:
[exec] Result: 1
[jar] Building jar: C:\DATA\PROJECTS\Saleskit\eclipse\jruby\lib\jruby.jar
init:
jar:
init:
extract-rdocs:
prepare:
compile-tasks:
[copy] Copying 1 file to C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build\classes\jruby
compile-annotation-binder:
check-for-optional-java4-packages:
check-for-optional-packages:
compile-jruby:
compile:
generate-method-classes:
gmc_internal:
generate-unsafe:
gu_internal:
jar-jruby:
[exec] Result: 1
[jar] Building jar: C:\DATA\PROJECTS\Saleskit\eclipse\jruby\lib\jruby.jar
compile-test:
[javac] Compiling 124 source files to C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build\classes\test
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
copy-test-files:
[copy] Copying 1 file to C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build\classes\test
instrument:
run-junit-compiled:
[echo] compile=JIT, jit.threshold=0, jit.max=-1, objectspace=true threadpool=false reflection=false version=ruby1_8
[junit] Testsuite: org.jruby.test.ScriptTestSuite
[junit] Tests run: 1, Failures: 0, Errors: 1, Time elapsed: 0 sec
[junit] Null Test: Caused an ERROR
[junit] null
[junit] java.lang.reflect.InvocationTargetException
[junit] Caused by: java.lang.Error: Unresolved compilation problem:
[junit] at org.jruby.Ruby.newInstance(Ruby.java:150)
[junit] at org.jruby.test.ScriptTestSuite.setupInterpreter(ScriptTestSuite.java:101)
[junit] at org.jruby.test.ScriptTestSuite.suite(ScriptTestSuite.java:92)

BUILD FAILED
C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build.xml:583: The following error occurred while executing this line:
C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build.xml:670: The following error occurred while executing this line:
C:\DATA\PROJECTS\Saleskit\eclipse\jruby\build.xml:623: Tests failed

Total time: 45 seconds
</pre>

Hope that helps somebody.

Actually...even though the jruby project compiles, if fails the ant test.

I'll try my luck with jruby 1.0.3 with the IBM WebSphere v6.1 JRE: IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Windows 2000 x86-32 j9vmwi3223ifx-20080811 (JIT enabled)...

This appears to be an error coming out of the Eclipse compiler, which allows bad code to compile and inserts error messages where there's syntax problems. We do have a continuous build running against J9 (Java 6) and it works just fine. Can you try to do this from a command line to ensure it's not using the Eclipse compiler?

If you're still having issues, please file a separate bug, since the ones reported here were already resolved.