error[E0659]: `std` is ambiguous
  --> $DIR/macro-path-prelude-shadowing.rs:39:9
   |
LL |         std::panic!(); //~ ERROR `std` is ambiguous
   |         ^^^ ambiguous name
   |
note: `std` could refer to the name imported here
  --> $DIR/macro-path-prelude-shadowing.rs:37:9
   |
LL |     use m2::*; // glob-import user-defined `std`
   |         ^^^^^
note: `std` could also refer to the name defined here
  --> $DIR/macro-path-prelude-shadowing.rs:39:9
   |
LL |         std::panic!(); //~ ERROR `std` is ambiguous
   |         ^^^
   = note: consider adding an explicit import of `std` to disambiguate

error: aborting due to previous error

For more information about this error, try `rustc --explain E0659`.