ruby blocks in the c api

m_func1 and m_func2 are both methods of a ruby class or module; m_func1 is implemented as:

VALUE
m_func1(VALUE self) {
m_func2();
}

the problem is if a block is passed to m_func1 it seems to also be passed onto m_func2, as they’re both running
in the same ‘ruby frame’ (scope, local variables, self etc). How to prevent this [...]