src/doc/reference/src/unsafety.md

   1 # Unsafety
   2
   3 Unsafe operations are those that potentially violate the memory-safety
   4 guarantees of Rust's static semantics.
   5
   6 The following language level features cannot be used in the safe subset of
   7 Rust:
   8
   9 - Dereferencing a [raw pointer](#pointer-types).
  10 - Reading or writing a [mutable static variable](#mutable-statics).
  11 - Calling an unsafe function (including an intrinsic or foreign function).