src/test/ui/macros/unknown-builtin.stderr

   1 error: cannot find a built-in macro with name `unknown`
   2   --> $DIR/unknown-builtin.rs:6:1
   3    |
   4 LL | macro_rules! unknown { () => () }
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   6
   7 error[E0773]: attempted to define built-in macro more than once
   8   --> $SRC_DIR/core/src/macros/mod.rs:LL:COL
   9    |
  10 LL |     macro_rules! line {
  11    |     ^^^^^^^^^^^^^^^^^
  12    |
  13 note: previously defined here
  14   --> $DIR/unknown-builtin.rs:9:1
  15    |
  16 LL | macro_rules! line { () => () }
  17    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  18
  19 error: aborting due to 2 previous errors
  20
  21 For more information about this error, try `rustc --explain E0773`.