RE: Can't M-x compile-defun `edebug' because dynamic variables are falsely taken as lexical.

[Drew Adams]

I _almost_ wanted to offer this, as a way to check dynamic vs lexical:

`symbol-value', wrapping with `condition-case', checking for
`void-variable' error and returning `nil' in that case.

But if there are a dynamic var and a lexical var with the same name,
`symbol-value' just sees the former - no real way to test the latter.