error: Undefined Behavior: calling a function whose parameter #1 has type (i32, i32) passing argument of type i32
  --> tests/fail/function_pointers/abi_mismatch_simple.rs:LL:CC
   |
LL |     g(42)
   |     ^^^^^ Undefined Behavior occurred here
   |
   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
   = help: this means these two types are not *guaranteed* to be ABI-compatible across all targets
   = help: if you think this code should be accepted anyway, please report an issue with Miri
   = note: BACKTRACE:
   = note: inside `main` at tests/fail/function_pointers/abi_mismatch_simple.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