1 error: there is no argument named `x`
2 --> $DIR/unreachable-format-args.rs:13:5
4 LL | unreachable!("x is {x} and y is {y}", y = 0);
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7 = note: did you intend to capture a variable `x` from the surrounding scope?
8 = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
9 = note: this error originates in the macro `$crate::concat` which comes from the expansion of the macro `unreachable` (in Nightly builds, run with -Z macro-backtrace for more info)
11 error: aborting due to previous error