warning: unexpected `cfg` condition value
  --> $DIR/compact-values.rs:11:28
   |
LL | #[cfg(target(os = "linux", arch = "X"))]
   |                            ^^^^^^^^^^
   |
   = note: `#[warn(unexpected_cfgs)]` on by default
   = note: expected values for `target_arch` are: aarch64, arm, avr, bpf, hexagon, m68k, mips, mips64, msp430, nvptx64, powerpc, powerpc64, riscv32, riscv64, s390x, sparc, sparc64, wasm32, wasm64, x86, x86_64

warning: 1 warning emitted