error: unexpected token: `(7u32)`
  --> $DIR/key-value-expansion.rs:14:25
   |
LL |         #[rustc_dummy = $expr] // Any key-value attribute, not necessarily `doc`
   |                         ^^^^^
...
LL | bug!((column!()));
   | ------------------ in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: unexpected token: `"bug" + "found"`
  --> $DIR/key-value-expansion.rs:31:17
   |
LL |         #[doc = $test]
   |                 ^^^^^
...
LL | bug!();
   | ------- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: unexpected token: `{
    let res =
        ::alloc::fmt::format(::core::fmt::Arguments::new_v1(&[""],
                                                            &match (&"u8",) {
                                                                 (arg0,) =>
                                                                 [::core::fmt::ArgumentV1::new(arg0,
                                                                                               ::core::fmt::Display::fmt)],
                                                             }));
    res
}.as_str()`
  --> $DIR/key-value-expansion.rs:42:17
   |
LL |         #[doc = $x]
   |                 ^^
...
LL | some_macro!(u8);
   | ---------------- in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 3 previous errors