src/test/ui/fmt/format-args-capture-macro-hygiene.stderr

   1 error: there is no argument named `foo`
   2   --> $DIR/format-args-capture-macro-hygiene.rs:4:13
   3    |
   4 LL |     format!(concat!("{foo}"));
   5    |             ^^^^^^^^^^^^^^^^
   6    |
   7    = note: did you intend to capture a variable `foo` from the surrounding scope?
   8    = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
   9    = note: this error originates in the macro `concat` (in Nightly builds, run with -Z macro-backtrace for more info)
  10
  11 error: there is no argument named `bar`
  12   --> $DIR/format-args-capture-macro-hygiene.rs:5:13
  13    |
  14 LL |     format!(concat!("{ba", "r} {}"), 1);
  15    |             ^^^^^^^^^^^^^^^^^^^^^^^
  16    |
  17    = note: did you intend to capture a variable `bar` from the surrounding scope?
  18    = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
  19    = note: this error originates in the macro `concat` (in Nightly builds, run with -Z macro-backtrace for more info)
  20
  21 error: aborting due to 2 previous errors
  22