src/test/ui/closures/2229_closure_analysis/migrations/auto_traits.stderr

   1 error: changes to closure capture in Rust 2021 will affect `Send` trait implementation for closure
   2   --> $DIR/auto_traits.rs:14:19
   3    |
   4 LL |     thread::spawn(move || unsafe {
   5    |                   ^^^^^^^^^^^^^^ in Rust 2018, this closure would implement `Send` as `fptr` implements `Send`, but in Rust 2021, this closure would no longer implement `Send` as `fptr.0` does not implement `Send`
   6 ...
   7 LL |         *fptr.0 = 20;
   8    |         ------- in Rust 2018, closure captures all of `fptr`, but in Rust 2021, it only captures `fptr.0`
   9    |
  10 note: the lint level is defined here
  11   --> $DIR/auto_traits.rs:2:9
  12    |
  13 LL | #![deny(rust_2021_incompatible_closure_captures)]
  14    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  15    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/disjoint-capture-in-closures.html>
  16 help: add a dummy let to cause `fptr` to be fully captured
  17    |
  18 LL |     thread::spawn(move || { let _ = &fptr; unsafe {
  19 LL |
  20 LL |
  21 LL |
  22 LL |
  23 LL |         *fptr.0 = 20;
  24  ...
  25
  26 error: changes to closure capture in Rust 2021 will affect `Sync`, `Send` trait implementation for closure
  27   --> $DIR/auto_traits.rs:34:19
  28    |
  29 LL |     thread::spawn(move || unsafe {
  30    |                   ^^^^^^^^^^^^^^ in Rust 2018, this closure would implement `Sync`, `Send` as `fptr` implements `Sync`, `Send`, but in Rust 2021, this closure would no longer implement `Sync`, `Send` as `fptr.0.0` does not implement `Sync`, `Send`
  31 ...
  32 LL |         *fptr.0.0 = 20;
  33    |         --------- in Rust 2018, closure captures all of `fptr`, but in Rust 2021, it only captures `fptr.0.0`
  34    |
  35    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/disjoint-capture-in-closures.html>
  36 help: add a dummy let to cause `fptr` to be fully captured
  37    |
  38 LL |     thread::spawn(move || { let _ = &fptr; unsafe {
  39 LL |
  40 LL |
  41 LL |
  42 LL |
  43 LL |         *fptr.0.0 = 20;
  44  ...
  45
  46 error: changes to closure capture in Rust 2021 will affect `Clone` trait implementation for closure and drop order
  47   --> $DIR/auto_traits.rs:58:13
  48    |
  49 LL |     let c = || {
  50    |             ^^ in Rust 2018, this closure would implement `Clone` as `f` implements `Clone`, but in Rust 2021, this closure would no longer implement `Clone` as `f.1` does not implement `Clone`
  51 ...
  52 LL |         let f_1 = f.1;
  53    |                   --- in Rust 2018, closure captures all of `f`, but in Rust 2021, it only captures `f.1`
  54 ...
  55 LL | }
  56    | - in Rust 2018, `f` would be dropped here, but in Rust 2021, only `f.1` would be dropped here alongside the closure
  57    |
  58    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/disjoint-capture-in-closures.html>
  59 help: add a dummy let to cause `f` to be fully captured
  60    |
  61 LL |     let c = || { let _ = &f;
  62 LL |
  63 LL |
  64 LL |
  65 LL |
  66 LL |         let f_1 = f.1;
  67  ...
  68
  69 error: aborting due to 3 previous errors
  70