error: cannot use value of type `!` for inline assembly
  --> $DIR/issue-87802.rs:11:36
   |
LL |         asm!("/* {0} */", out(reg) x);
   |                                    ^
   |
   = note: only integers, floats, SIMD vectors, pointers and function pointers can be used as arguments for inline assembly

error: aborting due to 1 previous error

