error: there is no argument named `foo`
  --> $DIR/format-args-capture-macro-hygiene.rs:2:13
   |
LL |     format!(concat!("{foo}"));
   |             ^^^^^^^^^^^^^^^^
   |
   = note: did you intend to capture a variable `foo` from the surrounding scope?
   = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
   = note: this error originates in the macro `concat` (in Nightly builds, run with -Z macro-backtrace for more info)

error: there is no argument named `bar`
  --> $DIR/format-args-capture-macro-hygiene.rs:3:13
   |
LL |     format!(concat!("{ba", "r} {}"), 1);
   |             ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: did you intend to capture a variable `bar` from the surrounding scope?
   = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
   = note: this error originates in the macro `concat` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 2 previous errors