message: bump up recursion limit for miri crate
diff: clippy::cast_lossless,
  clippy::cast_possible_truncation,
  )]
  +// Needed for rustdoc from bootstrap (with `-Znormalize-docs`).
  +#![recursion_limit = "256"]
  extern crate rustc_apfloat;
  extern crate rustc_ast;
  