error: unsupported operation: can't call foreign function `foo` on $OS
  --> tests/fail/unsupported_foreign_function.rs:LL:CC
   |
LL |         foo();
   |         ^^^^^ unsupported operation occurred here
   |
   = help: this means the program tried to do something Miri does not support; it does not indicate a bug in the program
   = note: BACKTRACE:
   = note: inside `main` at tests/fail/unsupported_foreign_function.rs:LL:CC

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to 1 previous error