src/test/ui/macros/builtin-prelude-no-accidents.rs

   1 // Names of public modules in libstd and libcore don't accidentally get into prelude
   2 // because macros with the same names are in prelude.
   3
   4 fn main() {
   5     env::current_dir; //~ ERROR use of undeclared crate or module `env`
   6     type A = panic::PanicInfo; //~ ERROR use of undeclared crate or module `panic`
   7     type B = vec::Vec<u8>; //~ ERROR use of undeclared crate or module `vec`
   8 }