From a discussion #3156 (comment) it was thought utilizing the clippy lint clippy::as_conversions would introduce additional safety.

It would be good to implement this lint, either via #![warn(clippy::as_conversions)] or passed as a command line argument under test_clippy.py.

To break up this work, we can implement the following lints incrementally:

• Use clippy::unnecessary_cast #3195
• Use clippy::cast_lossless #3196
• Use clippy::cast_possible_truncation #3197
• Use clippy::cast_possible_wrap #3198
• Use clippy::cast_precision_loss #3199
• Use clippy::cast_sign_loss #3200
• Use clippy::char_lit_as_u8 #3201
• Use clippy::ref_to_mut #3202
• Use clippy::ptr_as_ptr #3203
• In Cargo.toml replace

  ptr_as_ptr = "warn"
  cast_lossless = "warn"
  cast_possible_truncation = "warn"
  cast_possible_wrap = "warn"
  cast_sign_loss = "warn"
  

  with

  as_conversions = "warn"
  

  and fix warnings.