Crash with invokeDynamic on MethodMissing attempt

[Charles Oliver Nutter]

I'm also seeing crashes for several scenarios. Like this loop works:

a = 1; while a < 1_000_000; a += 1; end

But these two crash the JVM:

a = 1.0; while a < 1_000_000.0; foo(a); a += 1.0; end
def foo(a); end; a = 1; while a < 1_000_000; foo(a); a += 1; end

A simple fib bench also crashed. I've attached a dump from the "foo" 
case above, and I can provide a jruby dist to reproduce if you like.

It tends to stymie further experimentation :) (no pressure, I know this 
stuff has just recently started to JIT).

- Charlie

Yehuda Katz wrote:
> I'm trying to implement a simple method missing using invokeDynamic. 
> I've been able to make it work using static methods or static methods 
> that proxy to virtual methods (but not directly to virtual methods). 
> However, I'm trying to add support for including the name of the method 
> in the call to MethodMissing.
> 
> Based on the Fidget demo, it seemed like the way to go would be to 
> create a custom JavaMethodHandle that encapsulated the logic. I wasn't 
> able to get it working (mostly in the setTarget step). However, during 
> some experiments, I encountered a segfault in the JVM, so I figured I'd 
> report it. The details (including the minimal test case) are 
> at http://gist.github.com/113717.
> 
> That said, I'm curious about the appropriate way to wire this up. I'm 
> rather new to all of this, so I'm probably missing something obvious.
> 
> -- 
> Yehuda Katz
> Developer | Engine Yard
> (ph) 718.877.1325
> 
> 
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