rustc warns of unused imports #212
Description
When I construct a regex in a lazy_static, then rustc often presents a spurious warning that the regex import is unused.
I tried moving use regex::Regex; into lazy_static, but that actually makes the compilation hard fail.
I also added a unit test with #[test], but that still triggers the spurious unused import warning.
What are we supposed to do to resolve that?
For context, this problem happens when using lazy_static members inside of a PEG grammar.
(I know, weird to import the regex library into a PEG grammar. But I have my reasons.)