java.lang.ClassFormatError

[googya]

I compiled the example code successfully using jruby, but when running the class SimpleLoop, some exceptions are thrown out :

Exception in thread "main" java.lang.ClassFormatError: Illegal UTF8 string in co
nstant pool in class file SimpleLoop
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

[baroquebobcat]

Interesting. Can you tell me more about your environment? Also, how are you running the classfile?

[googya]

windows xp
jruby 1.6.3 (ruby-1.8.7-p330) (2011-07-07 965162f) (Java HotSpot(TM) Client VM 1
.6.0_21) [Windows XP-x86-java]

C:\java_example>bitec myfile.bs

C:\java_example>java myfile
Exception in thread "main" java.lang.ClassFormatError: Unknown constant tag 101
in class file myfile
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)

---

myfile.bs:
main do
getstatic java.lang.System, "out",
java.io.PrintStream
ldc "Hello, world!"
invokevirtual java.io.PrintStream, "println",
[java.lang.Void::TYPE, java.lang.Object]
returnvoid
end

[baroquebobcat]

weird
when I do that, I get Hello, world I'm on OSX w/ same jruby, Java 1.6.0_24.

which version of bitescript are you using? it worked for me with 0.0.8, 0.0.9 and latest. 0.0.7 gives me an error on compilation.

[googya]

D:>jruby -S gem list bite

*** LOCAL GEMS ***

bitescript (0.0.9, 0.0.8)

if biting the myfile.bs, it's ok, the "hello, world" is the result.

C:\java_example>bite myfile.bs
Hello, world!

But,when your compiling it to class file, and then running it, the error will be there.

[baroquebobcat]

Huh, I don't get that. I don't have a windows box to test on though. Does this happen with any of the other examples?

[headius]

There have been a lot of encoding fixes for JRuby in 1.6.4 and 1.6.5. Perhaps one of those fixed it? Please retest and reopen if necessary.

[messi18]

my jruby version is 1.6.6, but this issue is still there:

C:\jruby-1.6.6>java SimpleLoop
Exception in thread "main" java.lang.ClassFormatError: Illegal UTF8 string in constant pool in class file SimpleLoop
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: SimpleLoop. Program will exit.

C:\jruby-1.6.6>java -version
java version "1.6.0_27"
Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode)

C:\jruby-1.6.6>jruby -S gem list bitescript

*** LOCAL GEMS ***

bitescript (0.1.0)

[messi18]

I just made a fix. It works well now. You can get it from my branch for a test. I've already send a pull request to the author.