| error: Undefined Behavior: reading memory at ALLOC[0x0..0x4], but memory is uninitialized at [0x0..0x4], and this operation requires initialized memory | 
 |   --> tests/fail/validity/invalid_int_op.rs:LL:CC | 
 |    | | 
 | LL |     let i = unsafe { std::mem::MaybeUninit::<i32>::uninit().assume_init() }; | 
 |    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 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 | 
 |  | 
 | Uninitialized memory occurred at ALLOC[0x0..0x4], in this allocation: | 
 | ALLOC (stack variable, size: 4, align: 4) { | 
 |     __ __ __ __                                     │ ░░░░ | 
 | } | 
 |  | 
 | note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace | 
 |  | 
 | error: aborting due to 1 previous error | 
 |  |