A generic arrow or function expression bound inside a function or method
compiles when it uses nothing from the enclosing function's frame: no
`this`, `super`, `arguments` or `new.target`, and no local, parameter or
type parameter of an enclosing function. Its instantiations are module
functions, as for a module-scope binding, and may call the binding itself
and read module-scope bindings. Instances of bindings in functions and
blocks take the declaration's position in their names, so two functions
may declare bindings of the same name. Bindings that use the enclosing
frame keep their SC1090 fence.
Fixes#1624
Co-authored-by: ejc3 <1694850+ejc3@users.noreply.github.com>
