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fn borrow(_v: &isize) {}
fn local() {
let mut v: Box<_> = Box::new(3);
borrow(&*v);
}
fn local_rec() {
struct F { f: Box<isize> }
let mut v = F {f: Box::new(3)};
borrow(&*v.f);
}
fn local_recs() {
struct F { f: G }
struct G { g: H }
struct H { h: Box<isize> }
let mut v = F {f: G {g: H {h: Box::new(3)}}};
borrow(&*v.f.g.h);
}
fn aliased_imm() {
let mut v: Box<_> = Box::new(3);
let w = &v;
borrow(&*v);
w.use_ref();
}
fn aliased_mut() {
let mut v: Box<_> = Box::new(3);
let w = &mut v;
borrow(&*v); //~ ERROR cannot borrow `*v`
w.use_mut();
}
fn aliased_other() {
let mut v: Box<_> = Box::new(3);
let mut w: Box<_> = Box::new(4);
let x = &mut w;
borrow(&*v);
x.use_mut();
}
fn aliased_other_reassign() {
let mut v: Box<_> = Box::new(3);
let mut w: Box<_> = Box::new(4);
let mut x = &mut w;
x = &mut v;
borrow(&*v); //~ ERROR cannot borrow `*v`
x.use_mut();
}
fn main() {
}
trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
impl<T> Fake for T { }
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