#![allow(warnings)]
fn main() {
   

let mut z = 4;

let mut x = & mut z;

//-----------------------------

let  mut s = 444; 

let mut d = &mut s;

//------------------------------

let mut f: &mut & mut u32;
 
f = &mut x;

f = &mut d;

println!("{}",f);

//-------------------------------

let mut zz = 4444;
let mut ss = 4444;


d= & mut zz;
x = & mut ss;


println!("{}",zz);
println!("{}",ss);

println!("{}",d);


}

(Playground)

Errors:

   Compiling playground v0.0.1 (/playground)
error[E0502]: cannot borrow `zz` as immutable because it is also borrowed as mutable
  --> src/main.rs:35:15
   |
31 | d= & mut zz;
   |    -------- mutable borrow occurs here
...
35 | println!("{}",zz);
   |               ^^ immutable borrow occurs here
...
38 | println!("{}",d);
   |               - mutable borrow later used here
   |
   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0502]: cannot borrow `ss` as immutable because it is also borrowed as mutable
  --> src/main.rs:36:15
   |
32 | x = & mut ss;
   |     -------- mutable borrow occurs here
...
36 | println!("{}",ss);
   |               ^^ immutable borrow occurs here
37 |
38 | println!("{}",d);
   |               - mutable borrow later used here
   |
   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)

For more information about this error, try `rustc --explain E0502`.
error: could not compile `playground` (bin "playground") due to 2 previous errors

1 post - 1 participant

Read full topic