{"action":"created","comment":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/comments/23503350","id":23503350,"diff_hunk":"@@ -489,28 +587,25 @@ impl<'b, T> DerefMut for RefMut<'b, T> {\n \n /// The core primitive for interior mutability in Rust.\n ///\n-/// `UnsafeCell` type that wraps a type T and indicates unsafe interior\n-/// operations on the wrapped type. Types with an `UnsafeCell<T>` field are\n-/// considered to have an *unsafe interior*. The `UnsafeCell` type is the only\n-/// legal way to obtain aliasable data that is considered mutable. In general,\n-/// transmuting an &T type into an &mut T is considered undefined behavior.\n+/// `UnsafeCell<T>` is a type that wraps some `T` and indicates unsafe interior operations on the\n+/// wrapped type. Types with an `UnsafeCell<T>` field are considered to have an 'unsafe interior'.\n+/// The `UnsafeCell<T>` type is the only legal way to obtain aliasable data that is considered\n+/// mutable. In general, transmuting an `&T` type into an `&mut T` is considered undefined behavior.\n ///\n-/// Although it is possible to put an `UnsafeCell<T>` into static item, it is\n-/// not permitted to take the address of the static item if the item is not\n-/// declared as mutable. This rule exists because immutable static items are\n-/// stored in read-only memory, and thus any attempt to mutate their interior\n-/// can cause segfaults. Immutable static items containing `UnsafeCell<T>`\n-/// instances are still useful as read-only initializers, however, so we do not\n-/// forbid them altogether.\n+/// Although it is possible to put an `UnsafeCell<T>` into static item, it is not permitted to take","path":"src/libcore/cell.rs","position":376,"original_position":376,"commit_id":"edc67817a312d2c7924ae333facb9294ff751008","original_commit_id":"edc67817a312d2c7924ae333facb9294ff751008","user":{"login":"tbu-","id":6666593,"avatar_url":"https://avatars.githubusercontent.com/u/6666593?v=3","gravatar_id":"","url":"https://api.github.com/users/tbu-","html_url":"https://github.com/tbu-","followers_url":"https://api.github.com/users/tbu-/followers","following_url":"https://api.github.com/users/tbu-/following{/other_user}","gists_url":"https://api.github.com/users/tbu-/gists{/gist_id}","starred_url":"https://api.github.com/users/tbu-/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tbu-/subscriptions","organizations_url":"https://api.github.com/users/tbu-/orgs","repos_url":"https://api.github.com/users/tbu-/repos","events_url":"https://api.github.com/users/tbu-/events{/privacy}","received_events_url":"https://api.github.com/users/tbu-/received_events","type":"User","site_admin":false},"body":"@steveklabnik Is this still true as of today, after introducing `const`? I think the `static` semantics have changed.","created_at":"2015-01-25T10:17:50Z","updated_at":"2015-01-25T10:17:50Z","html_url":"https://github.com/rust-lang/rust/pull/21564#discussion_r23503350","pull_request_url":"https://api.github.com/repos/rust-lang/rust/pulls/21564","_links":{"self":{"href":"https://api.github.com/repos/rust-lang/rust/pulls/comments/23503350"},"html":{"href":"https://github.com/rust-lang/rust/pull/21564#discussion_r23503350"},"pull_request":{"href":"https://api.github.com/repos/rust-lang/rust/pulls/21564"}}},"pull_request":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/21564","id":27950959,"html_url":"https://github.com/rust-lang/rust/pull/21564","diff_url":"https://github.com/rust-lang/rust/pull/21564.diff","patch_url":"https://github.com/rust-lang/rust/pull/21564.patch","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/21564","number":21564,"state":"open","locked":false,"title":"Improve libcore/cell.rs 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