On windows if JAVA_HOME ends in a '\' then native launcher bombs

C:\Users\enebo>set JAVA_HOME=C:\Program Files\Java\jdk1.6.0_23\

C:\Users\enebo>jruby -Xtrace trace.log -v
Exception in thread "main" java.lang.NoClassDefFoundError: bar
Caused by: java.lang.ClassNotFoundException: bar
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: bar.  Program will exit.

Starting platform... 
	Binary name is: jruby

Module: c:\jruby-1.6.7.1\bin\jruby.dll
Platform dir: c:\jruby-1.6.7.1
Parsing arguments:
	-Xtrace
	trace.log
	-v
-Xjdkhome is not set, checking for %JAVA_HOME%...
%JAVA_HOME% is set: C:\Program Files\Java\jdk1.6.0_23\
JvmLauncher::initialize()
	javaPathOrMinVersion: C:\Program Files\Java\jdk1.6.0_23\
checkJava(C:\Program Files\Java\jdk1.6.0_23\)
File "C:\Program Files\Java\jdk1.6.0_23\jre\bin\client\jvm.dll" does not exist
File "C:\Program Files\Java\jdk1.6.0_23\jre\bin\server\jvm.dll" exists
File "C:\Program Files\Java\jdk1.6.0_23\jre\bin\java.exe" exists
File "C:\Program Files\Java\jdk1.6.0_23\jre\bin\javaw.exe" exists
*** No need to clean the binary name: jruby
constructBootClassPath()
File "c:\jruby-1.6.7.1\lib\jruby.jar" exists
addToBootClassPath()
	path: c:\jruby-1.6.7.1\lib\jruby.jar
	onlyIfExists: true
File "c:\jruby-1.6.7.1\lib\jruby.jar" exists
File "c:\jruby-1.6.7.1\lib\jruby-complete.jar" does not exist
BootclassPath: c:\jruby-1.6.7.1\lib\jruby.jar
constructClassPath()
addJarsToClassPathFrom()
	dir: c:\jruby-1.6.7.1
addToClassPath()
	path: c:\jruby-1.6.7.1\lib\jruby.jar
	onlyIfExists: false
No need to add "c:\jruby-1.6.7.1\lib\jruby.jar" to classpath, it's already in bootclasspath
No explicit classpath option is used, looking up %CLASSPATH% env
addToClassPath()
	path: C:\foo bar bag\
	onlyIfExists: false
ClassPath: C:\foo bar bag\;
JvmLauncher::getJavaPath()
Starting application...
JvmLauncher::start()
	mainClassName: org/jruby/Main
	separateProcess: false
  args:
	-v
  options:
	-Djdk.home=C:\Program Files\Java\jdk1.6.0_23\
	-Djruby.home=c:\jruby-1.6.7.1
	-Djruby.script=jruby
	-Djruby.shell=cmd.exe
	-Djffi.boot.library.path=c:\jruby-1.6.7.1\lib\native\i386-Windows;c:\jruby-1.6.7.1\lib\native\x86_64-Windows
	-Xmx500m
	-Xss2048k
	-Djruby.memory.max=500m
	-Djruby.stack.max=2048k
	-Dsun.java.command=org.jruby.Main
	-Djava.class.path=C:\foo bar bag\;
	-Xbootclasspath/a:c:\jruby-1.6.7.1\lib\jruby.jar
Java DLL path: C:\Program Files\Java\jdk1.6.0_23\jre\bin\server\jvm.dll
PrepareDllPath: C:\Program Files\Java\jdk1.6.0_23\jre\bin
Falling back to running Java in a separate process; DLL cannot be loaded (64-bit DLL?).
Command line:
"C:\Program Files\Java\jdk1.6.0_23\jre\bin\java.exe" "-Djdk.home=C:\Program Files\Java\jdk1.6.0_23\" "-Djruby.home=c:\jruby-1.6.7.1" "-Djruby.script=jruby" "-Djruby.shell=cmd.exe" "-Djffi.boot.library.path=c:\jruby-1.6.7.1\lib\native\i386-Windows;c:\jruby-1.6.7.1\lib\native\x86_64-Windows" "-Xmx500m" "-Xss2048k" "-Djruby.memory.max=500m" "-Djruby.stack.max=2048k" "-Dsun.java.command=org.jruby.Main" "-Djava.class.path=C:\foo bar bag\;" "-Xbootclasspath/a:c:\jruby-1.6.7.1\lib\jruby.jar" org/jruby/Main "-v"
onExit()