error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:8:9 | LL | ref mut z @ &mut Some(ref a) => { | ---------^^^^^^^^^^^^^-----^ | | | | | value is borrowed by `a` here | value is mutably borrowed by `z` here error: cannot borrow value as mutable more than once at a time --> $DIR/borrowck-pat-ref-mut-and-ref.rs:33:9 | LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub | ---------^^^^-----------------^ | | | | | | | value is mutably borrowed by `c` here | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:33:22 | LL | let ref mut a @ (ref b @ ref mut c) = u(); // sub-in-sub | -----^^^--------- | | | | | value is mutably borrowed by `c` here | value is borrowed by `b` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:37:9 | LL | let ref a @ ref mut b = U; | -----^^^--------- | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:39:9 | LL | let ref mut a @ ref b = U; | ---------^^^----- | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:41:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | -----^^^^---------^^---------^ | | | | | | | value is mutably borrowed by `c` here | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:43:9 | LL | let ref mut a @ (ref b, ref c) = (U, U); | ---------^^^^-----^^-----^ | | | | | | | value is borrowed by `c` here | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:46:9 | LL | let ref mut a @ ref b = u(); | ---------^^^----- | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:51:9 | LL | let ref a @ ref mut b = u(); | -----^^^--------- | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:57:9 | LL | let ref mut a @ ref b = U; | ---------^^^----- | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:61:9 | LL | let ref a @ ref mut b = U; | -----^^^--------- | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:67:9 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => { | ---------^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:67:33 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) => { | ---------^^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:9 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => { | -----^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:33 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => { | -----^^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:9 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {} | -----^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:33 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {} | -----^^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:9 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {} | ---------^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:33 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {} | ---------^^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:9 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} | -----^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:33 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} | -----^^^^^^^---------^ | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:109:9 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {} | ---------^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:109:33 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {} | ---------^^^^^^^-----^ | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:117:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | -----^^^^---------^^---------^ | | | | | | | value is mutably borrowed by `c` here | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:123:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | -----^^^^---------^^---------^ | | | | | | | value is mutably borrowed by `c` here | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:129:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | -----^^^^---------^^---------^ | | | | | | | value is mutably borrowed by `c` here | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:134:9 | LL | let ref mut a @ (ref b, ref c) = (U, U); | ---------^^^^-----^^-----^ | | | | | | | value is borrowed by `c` here | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:22:11 | LL | fn f1(ref a @ ref mut b: U) {} | -----^^^--------- | | | | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:24:11 | LL | fn f2(ref mut a @ ref b: U) {} | ---------^^^----- | | | | | value is borrowed by `b` here | value is mutably borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:26:11 | LL | fn f3(ref a @ [ref b, ref mut mid @ .., ref c]: [U; 4]) {} | -----^^^^^^^^^^^----------------^^^^^^^^ | | | | | value is mutably borrowed by `mid` here | value is borrowed by `a` here error: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:28:22 | LL | fn f4_also_moved(ref a @ ref mut b @ c: U) {} | -----^^^------------- | | | | | | | value is moved into `c` here | | value is mutably borrowed by `b` here | value is borrowed by `a` here error: cannot move out of value because it is borrowed --> $DIR/borrowck-pat-ref-mut-and-ref.rs:28:30 | LL | fn f4_also_moved(ref a @ ref mut b @ c: U) {} | ---------^^^- | | | | | value is moved into `c` here | value is mutably borrowed by `b` here error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:8:31 | LL | ref mut z @ &mut Some(ref a) => { | --------- ^^^^^ immutable borrow occurs here | | | mutable borrow occurs here ... LL | **z = None; | ---------- mutable borrow later used here error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:46:9 | LL | let ref mut a @ ref b = u(); | ^^^^^^^^^ ----- immutable borrow occurs here | | | mutable borrow occurs here ... LL | drop(b); | - immutable borrow later used here error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:51:9 | LL | let ref a @ ref mut b = u(); | ^^^^^ --------- mutable borrow occurs here | | | immutable borrow occurs here ... LL | *b = u(); | -------- mutable borrow later used here error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:20 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => { | ----- ^^^^^^^^^ mutable borrow occurs here | | | immutable borrow occurs here ... LL | drop(a); | - immutable borrow later used here error[E0502]: cannot borrow value as mutable because it is also borrowed as immutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:76:45 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) => { | ----- ^^^^^^^^^ mutable borrow occurs here | | | immutable borrow occurs here ... LL | drop(a); | - immutable borrow later used here error[E0594]: cannot assign to `*b`, as it is immutable for the pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:87:61 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { *b = U; false } => {} | ^^^^^^ cannot assign | = note: variables bound in patterns are immutable until the end of the pattern guard error[E0594]: cannot assign to `*a`, as it is immutable for the pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:94:61 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { *a = Err(U); false } => {} | ^^^^^^^^^^^ cannot assign | = note: variables bound in patterns are immutable until the end of the pattern guard error[E0507]: cannot move out of `b` in pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:66 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} | ^ move occurs because `b` has type `&mut U`, which does not implement the `Copy` trait | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard error[E0507]: cannot move out of `b` in pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:101:66 | LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} | ^ move occurs because `b` has type `&mut U`, which does not implement the `Copy` trait | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard error[E0507]: cannot move out of `a` in pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:109:66 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {} | ^ move occurs because `a` has type `&mut Result`, which does not implement the `Copy` trait | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard error[E0507]: cannot move out of `a` in pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:109:66 | LL | ref mut a @ Ok(ref b) | ref mut a @ Err(ref b) if { drop(a); false } => {} | ^ move occurs because `a` has type `&mut Result`, which does not implement the `Copy` trait | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:117:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | ^^^^^ --------- mutable borrow occurs here | | | immutable borrow occurs here ... LL | *b = U; | ------ mutable borrow later used here error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:123:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | ^^^^^ --------- mutable borrow occurs here | | | immutable borrow occurs here ... LL | *b = U; | ------ mutable borrow later used here error[E0502]: cannot borrow value as immutable because it is also borrowed as mutable --> $DIR/borrowck-pat-ref-mut-and-ref.rs:129:9 | LL | let ref a @ (ref mut b, ref mut c) = (U, U); | ^^^^^ --------- mutable borrow occurs here | | | immutable borrow occurs here LL | LL | *b = U; | ------ mutable borrow later used here error[E0382]: borrow of moved value --> $DIR/borrowck-pat-ref-mut-and-ref.rs:28:30 | LL | fn f4_also_moved(ref a @ ref mut b @ c: U) {} | ----- ^^^^^^^^^ - value moved here | | | | | value borrowed here after move | move occurs because value has type `U`, which does not implement the `Copy` trait error: aborting due to 47 previous errors Some errors have detailed explanations: E0382, E0502, E0507, E0594. For more information about an error, try `rustc --explain E0382`.