rust-lang/rust — pull request #15964 by huonw (2014-07-25 00:08:20+00:00)
Title: rustc: gensym the module names for --test to avoid introducing names.

This requires avoiding `quote_...!` for constructing the parts of the
__test module, since that stringifies and reinterns the idents, loosing
the special gensym'd nature of them. (#15962.)