# 見えないところでunsafeで一旦実行できるも、ちょっと修正するとコアダンプの例ｗ 修正はunsafeでない場所ｗ
cargo install cargo-edit cargo-geiger
cargo new --lib maybe_safe
cd maybe_safe
cat >src/lib.rs <<EOF
pub fn read_address_4byte(address: usize) -> i32 { unsafe { *(address as *const i32) } }
EOF
cargo build
cd ..
cargo new perfectly_safe
cd perfectly_safe
cargo add --path ../maybe_safe maybe_safe
cat >src/main.rs <<EOF
#![forbid(unsafe_code)]
fn main() { maybe_safe::read_address_4byte(&0 as *const i32 as usize); }
EOF
cargo geiger
cargo run
cat >src/main.rs <<EOF
#![forbid(unsafe_code)]
fn main() { maybe_safe::read_address_4byte(0); }
EOF
cargo geiger
cargo run