error: Undefined Behavior: `float_to_int_unchecked` intrinsic called on -1 which cannot be represented in target type `u128`
  --> $DIR/float_to_int_64_neg.rs:LL:CC
   |
LL |         float_to_int_unchecked::<f64, u128>(-1.0000000000001f64);
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `float_to_int_unchecked` intrinsic called on -1 which cannot be represented in target type `u128`
   |
   = 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: BACKTRACE:
   = note: inside `main` at $DIR/float_to_int_64_neg.rs:LL:CC

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

error: aborting due to previous error