Hi All,

On Tue, Mar 6, 2012 at 9:01 PM, fwierzbicki@gmail.com <fwierzbicki@gmail.com> wrote:

> 2) The most important JVM 7 feature for Jython would be to make use of the
> new invokedynamic opcode. I've spent a lot of effort trying to do this for
> Clojure, and I can tell you that it's far from trivial. We would need to
> upgrade to ASM 4, and do some painful work in adjusting to JVM 7's enforced
> class verifiability.
Can you say more (or give a link) about JVM 7 enforced class
verifiability - quick googling didn't turn anything up for me.

Maybe I can pitch in here. 

I think Tal is talking about the JVM class verifier. Java 7 verifier has stronger than the one from Java 6 and causes a java.lang.VerifyError for code generated by ASM. 
I encountered this issue a while back after upgrading to ASM4 and I think it's fixed in my branch.

Shashank Bharadwaj