I am developing an application in which Ruby is embedded in a C++ 
program that defines some native classes and methods and then calls 
ruby_exec to run some script.   The script calls the C++ methods and all 
works well.

Now I want to be able to examine ruby expressions inside these C++ 
methods.  I'm trying to call rb_eval_string  but that only kills my 
script run.
Is there a way to do this?

btw, the expressions are simple variable queries, but not necessarily 
ones that fall into one of the rb_?var_get methods (i.e.  local function 
vars)


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