Got this recently…
E:\installs\ruby191p376\lib\ruby\gems\1.9.1\gems\redcar-0.3.2dev>e:\dev\ruby\downloads\jruby\bin\jruby.EXE
–server --fast
-J-Dorg.eclipse.swt.browser.XULRunnerPath=“e:\installs\xulrunner”
E:\installs\ruby191p376\lib\ruby\gems\1.9.1\gems\redcar-0.3.2dev\bin\redcar
warning: could not compile; pass -d or
-J-Djruby.jit.logging.verbose=true for more details
Error, could not compile; pass -J-Djruby.jit.logging.verbose=true for
more details
Exception in thread “main” load error: builtin/gem_prelude –
java.lang.NullPointerException: null (LoadError)
…internal jruby stack elided…
from (unknown).(unknown)(:1)
(with JRUBY_OPTs=–1.9)
Hi Roger,
Charlie added gem_prelude.rb to JRuby on January 19th. And it seems
that compiler is choking on this file in 1.9 mode.
See the bug report: http://jira.codehaus.org/browse/JRUBY-4585
One thing to investigate, if you could do that, is what exactly in
that file breaks the compiler and to update the bug report. With that
extra info Charlie would probably be able to fix this 
Thanks,
–Vladimir
On Tue, Feb 23, 2010 at 11:59 PM, Roger P. [email protected]
wrote:
Exception in thread “main” load error: builtin/gem_prelude –
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On Wed, Feb 24, 2010 at 3:29 AM, Vladimir S. [email protected]
wrote:
Hi Roger,
Charlie added gem_prelude.rb to JRuby on January 19th. And it seems
that compiler is choking on this file in 1.9 mode.
See the bug report: http://jira.codehaus.org/browse/JRUBY-4585
One thing to investigate, if you could do that, is what exactly in
that file breaks the compiler and to update the bug report. With that
extra info Charlie would probably be able to fix this
JRuby’s compiler has not yet been updated for 1.9.2 behavior (because
I’m not sure we even have the interpreter working 100% for 1.9.2
behavior).
So nobody should expect the compiler to work in 1.9 mode yet If it
does…you’re just lucky.
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