message: renamed Immediate::to_scalar_or_undef
  to Immediate::to_scalar_or_uninit
  in src/shims/intrinsics.rs
  related issue
diff: @@ -392,7 +392,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
  // `binary_op` will bail if either of them is not a scalar.
  let eq = this.overflowing_binary_op(mir::BinOp::Eq, old, expect_old)?.0;
  - let res = Immediate::ScalarPair(old.to_scalar_or_undef(), eq.into());
  + let res = Immediate::ScalarPair(old.to_scalar_or_uninit(), eq.into());
  // Return old value.
  this.write_immediate(res, dest)?;
  // Update ptr depending on comparison.
  