1 error[E0133]: mutation of layout constrained field is unsafe and requires unsafe function or block
2 --> $DIR/ranged_ints4.rs:11:5
5 | ^^^^^^^ mutation of layout constrained field
7 = note: mutating layout constrained fields cannot statically be checked for valid values
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0133`.