mirror of
https://github.com/rust-lang/rust
synced 2024-10-14 04:23:37 +00:00
e5c330ac48
This is a aspect of Rust that frequently trips up people who are not aware of it yet. This diagnostic attempts to explain what's happening and why the lifetime constraint, that was never mentioned in the source, arose.
159 lines
7.5 KiB
Plaintext
159 lines
7.5 KiB
Plaintext
error[E0503]: cannot use `self.cx` because it was mutably borrowed
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:21:23
|
|
|
|
|
LL | let _mut_borrow = &mut *self;
|
|
| ---------- `*self` is borrowed here
|
|
LL | let _access = self.cx;
|
|
| ^^^^^^^ use of borrowed `*self`
|
|
LL |
|
|
LL | _mut_borrow;
|
|
| ----------- borrow later used here
|
|
|
|
error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:57:17
|
|
|
|
|
LL | self.hash_expr(&self.cx_mut.body(eid).value);
|
|
| ^^^^^---------^^-----------^^^^^^^^^^^^^^^^^
|
|
| | | |
|
|
| | | immutable borrow occurs here
|
|
| | immutable borrow later used by call
|
|
| mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:119:51
|
|
|
|
|
LL | reg.register_static(Box::new(TrivialPass::new(&mut reg.sess_mut)));
|
|
| --- --------------- ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:122:54
|
|
|
|
|
LL | reg.register_bound(Box::new(TrivialPass::new_mut(&mut reg.sess_mut)));
|
|
| --- -------------- ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:125:53
|
|
|
|
|
LL | reg.register_univ(Box::new(TrivialPass::new_mut(&mut reg.sess_mut)));
|
|
| --- ------------- ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:128:44
|
|
|
|
|
LL | reg.register_ref(&TrivialPass::new_mut(&mut reg.sess_mut));
|
|
| --- ------------ ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0502]: cannot borrow `*reg` as mutable because it is also borrowed as immutable
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:138:5
|
|
|
|
|
LL | reg.register_bound(Box::new(CapturePass::new(®.sess_mut)));
|
|
| ^^^^--------------^^^^^^^^^^^^^^^^^^^^^^^^^^^-------------^^^
|
|
| | | |
|
|
| | | immutable borrow occurs here
|
|
| | immutable borrow later used by call
|
|
| mutable borrow occurs here
|
|
|
|
error[E0502]: cannot borrow `*reg` as mutable because it is also borrowed as immutable
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:141:5
|
|
|
|
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
|
|
| -- lifetime `'a` defined here
|
|
...
|
|
LL | reg.register_univ(Box::new(CapturePass::new(®.sess_mut)));
|
|
| ^^^^^^^^^^^^^^^^^^-----------------------------------------^
|
|
| | | |
|
|
| | | immutable borrow occurs here
|
|
| | cast requires that `reg.sess_mut` is borrowed for `'a`
|
|
| mutable borrow occurs here
|
|
|
|
|
= note: due to object lifetime defaults, `Box<dyn for<'b> LateLintPass<'b>>` actually means `Box<(dyn for<'b> LateLintPass<'b> + 'static)>`
|
|
|
|
error[E0502]: cannot borrow `*reg` as mutable because it is also borrowed as immutable
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:144:5
|
|
|
|
|
LL | reg.register_ref(&CapturePass::new(®.sess_mut));
|
|
| ^^^^------------^^^^^^^^^^^^^^^^^^^-------------^^
|
|
| | | |
|
|
| | | immutable borrow occurs here
|
|
| | immutable borrow later used by call
|
|
| mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `*reg` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:154:5
|
|
|
|
|
LL | reg.register_bound(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
|
|
| ^^^^--------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-----------------^^^
|
|
| | | |
|
|
| | | first mutable borrow occurs here
|
|
| | first borrow later used by call
|
|
| second mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:154:54
|
|
|
|
|
LL | reg.register_bound(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
|
|
| --- -------------- ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `*reg` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:158:5
|
|
|
|
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
|
|
| -- lifetime `'a` defined here
|
|
...
|
|
LL | reg.register_univ(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
|
|
| ^^^^^^^^^^^^^^^^^^-------------------------------------------------^
|
|
| | | |
|
|
| | | first mutable borrow occurs here
|
|
| | cast requires that `reg.sess_mut` is borrowed for `'a`
|
|
| second mutable borrow occurs here
|
|
|
|
|
= note: due to object lifetime defaults, `Box<dyn for<'b> LateLintPass<'b>>` actually means `Box<(dyn for<'b> LateLintPass<'b> + 'static)>`
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:158:53
|
|
|
|
|
LL | reg.register_univ(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
|
|
| --- ------------- ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `*reg` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:162:5
|
|
|
|
|
LL | reg.register_ref(&CapturePass::new_mut(&mut reg.sess_mut));
|
|
| ^^^^------------^^^^^^^^^^^^^^^^^^^^^^^-----------------^^
|
|
| | | |
|
|
| | | first mutable borrow occurs here
|
|
| | first borrow later used by call
|
|
| second mutable borrow occurs here
|
|
|
|
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
|
|
--> $DIR/two-phase-surprise-no-conflict.rs:162:44
|
|
|
|
|
LL | reg.register_ref(&CapturePass::new_mut(&mut reg.sess_mut));
|
|
| --- ------------ ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
|
|
| | |
|
|
| | first borrow later used by call
|
|
| first mutable borrow occurs here
|
|
|
|
error: aborting due to 15 previous errors
|
|
|
|
Some errors have detailed explanations: E0499, E0502, E0503.
|
|
For more information about an error, try `rustc --explain E0499`.
|