Specify reentrancy gurantees of Once::call_once
#53024
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To expand a bit, I think we can guarantee a deadlock, but I can imagine that, for example, with |
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@bors: r+ |
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Specify reentrancy gurantees of `Once::call_once`
I don't think the docs are clear about what happens in the following code
```rust
static INIT: Once = ONCE_INIT;
INIT.call_once(|| INIT.call_once(|| println!("huh?")));
```
[Playground](https://play.rust-lang.org/?gist=15dde1f68a6ede263c7250c36977eade&version=stable&mode=debug&edition=2015)
Let's "specify" the behavior to make it clear that the current behavior (deadlock I think?) is not a strict guarantee.
kennytm
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Specify reentrancy gurantees of `Once::call_once`
I don't think the docs are clear about what happens in the following code
```rust
static INIT: Once = ONCE_INIT;
INIT.call_once(|| INIT.call_once(|| println!("huh?")));
```
[Playground](https://play.rust-lang.org/?gist=15dde1f68a6ede263c7250c36977eade&version=stable&mode=debug&edition=2015)
Let's "specify" the behavior to make it clear that the current behavior (deadlock I think?) is not a strict guarantee.
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@bors rollup |
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Rollup of 14 pull requests Successful merges: - #51919 (Provide `{to,from}_{ne,le,be}_bytes` functions on integers) - #52940 (Align 6-week cycle check with beta promotion instead of stable release.) - #52968 (App-lint-cability) - #52969 (rustbuild: fix local_rebuild) - #52995 (Remove unnecessary local in await! generator) - #52996 (RELEASES.md: fix the `hash_map::Entry::or_default` link) - #53001 (privacy: Fix an ICE in `path_is_private_type`) - #53003 (Stabilize --color and --error-format options in rustdoc) - #53022 (volatile operations docs: clarify that this does not help wrt. concurrency) - #53024 (Specify reentrancy gurantees of `Once::call_once`) - #53041 (Fix invalid code css rule) - #53047 (Make entire row of doc search results clickable) - #53050 (Make left column of rustdoc search results narrower) - #53062 (Remove redundant field names in structs)
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I don't think the docs are clear about what happens in the following code
Playground
Let's "specify" the behavior to make it clear that the current behavior (deadlock I think?) is not a strict guarantee.