error: Undefined Behavior: constructing invalid value: encountered a dangling reference (use-after-free)
  --> tests/fail/validity/dangling_ref3.rs:LL:CC
   |
LL |     let _x: &i32 = unsafe { mem::transmute(dangling()) };
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^ 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

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

error: aborting due to 1 previous error

