With the reboot of the JRuby runtime in 9k, we lost some of the invokedynamic logic to bind directly through to method bodies. These cases reverted to "indirect" binding via the DynamicMethod.call path, since their unique call logic did not have an equivalent in the new JIT.

I have been fixing some of these, like Ruby to Java calls and aliased methods, but several remain. I list them here.

I also committed a change adding indirect binding warnings to the debug output from invokedynamic bindings.

• define_method methods, both those that have been converted into "simple" methods and those that remain a proc.call (affects class attributes and some delegating logic in Rails)
• Java method arities after the lowest one, varargs logic, and all Java calls that pass a block for closure conversion
• Variable-arity native methods in core classes, for arities beyond the first defined (affects at least send calls in Rails)
• Dynamic dispatch methods like send do not create a double call site and will never inline, even for a single target. (affects send calls in Rails, obviously)
• Struct accessors (affects a number of data objects in Rails)
• Methods that receive keyword args, due to the need to frobnicate