bjoernager/rust
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Auto merge of #95956 - yaahc:stable-in-unstable, r=cjgillot

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Support unstable moves via stable in unstable items

part of https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/moving.20items.20to.20core.20unstably and a blocker of https://github.com/rust-lang/rust/pull/90328.

The libs-api team needs the ability to move an already stable item to a new location unstably, in this case for Error in core. Otherwise these changes are insta-stable making them much harder to merge.

This PR attempts to solve the problem by checking the stability of path segments as well as the last item in the path itself, which is currently the only thing checked.
This commit is contained in:
bors 2022-07-14 13:42:09 +00:00
commit 24699bcbad
34 changed files with 304 additions and 33 deletions
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3
compiler/rustc_feature/src/builtin_attrs.rs
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@ -512,6 +512,9 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
allow_internal_unsafe, Normal, template!(Word), WarnFollowing,
"allow_internal_unsafe side-steps the unsafe_code lint",
),
rustc_attr!(rustc_allowed_through_unstable_modules, Normal, template!(Word), WarnFollowing,
"rustc_allowed_through_unstable_modules special cases accidental stabilizations of stable items \
through unstable paths"),
// ==========================================================================
// Internal attributes: Type system related: