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add proofs and fix postorder traversal

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I don't think the "quasi-postorder" travesal could cause any issues, but
there's no reason for it to stay broken.
This commit is contained in:
Ariel Ben-Yehuda 2017-09-13 01:09:56 +03:00
parent 0bb3dc19bf
commit 5c0feb86b9
4 changed files with 57 additions and 17 deletions
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8
src/test/ui/generator/not-send-sync.stderr
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@ -9,15 +9,15 @@ error[E0277]: the trait bound `std::cell::Cell<i32>: std::marker::Sync` is not s
= note: required because it appears within the type `[generator@$DIR/not-send-sync.rs:26:17: 30:6 a:&std::cell::Cell<i32> _]`
= note: required by `main::assert_send`
error[E0277]: the trait bound `std::cell::Cell<i32>: std::marker::Sync` is not satisfied in `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`
error[E0277]: the trait bound `std::cell::Cell<i32>: std::marker::Sync` is not satisfied in `[generator@$DIR/not-send-sync.rs:19:17: 23:6 (std::cell::Cell<i32>, ())]`
--> $DIR/not-send-sync.rs:19:5
|
19 | assert_sync(|| {
| ^^^^^^^^^^^ `std::cell::Cell<i32>` cannot be shared between threads safely
|
= help: within `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`, the trait `std::marker::Sync` is not implemented for `std::cell::Cell<i32>`
= note: required because it appears within the type `((), std::cell::Cell<i32>)`
= note: required because it appears within the type `[generator@$DIR/not-send-sync.rs:19:17: 23:6 ((), std::cell::Cell<i32>)]`
= help: within `[generator@$DIR/not-send-sync.rs:19:17: 23:6 (std::cell::Cell<i32>, ())]`, the trait `std::marker::Sync` is not implemented for `std::cell::Cell<i32>`
= note: required because it appears within the type `(std::cell::Cell<i32>, ())`
= note: required because it appears within the type `[generator@$DIR/not-send-sync.rs:19:17: 23:6 (std::cell::Cell<i32>, ())]`
= note: required by `main::assert_sync`
error: aborting due to 2 previous errors