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compiler: Make Externally Implementable Items (eii) in std build #150592

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@Enselic Enselic commented Jan 2, 2026 •
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Closes #150514

Merging this PR unblocks #150591 and that PR will also act as a regression test since the code in that PR does not build without this fix.

To be honest I don't fully understand why #[rustc_macro_transparency = "transparent"] works, all I know is that it works. Without it, we get > 800 errors that looks like this.

r? @jdonszelmann is maybe interested in reviewing? Of course feel free to re-roll if you don't have time right now though.

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@Enselic Enselic added the F-extern_item_impls `#![feature(extern_item_impls)]` label Jan 2, 2026
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jan 2, 2026
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rustbot commented Jan 2, 2026

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@rustbot rustbot added the T-libs Relevant to the library team, which will review and decide on the PR/issue. label Jan 2, 2026
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Enselic commented Jan 2, 2026 •
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Ok let's roll then:

r? compiler

@rustbot rustbot assigned lcnr and unassigned Mark-Simulacrum Jan 2, 2026
@Enselic Enselic added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jan 2, 2026
@Enselic Enselic marked this pull request as draft January 2, 2026 12:39
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@Enselic Enselic marked this pull request as ready for review January 2, 2026 16:44
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jan 2, 2026
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Enselic commented Jan 2, 2026

@rustbot ready

@Enselic Enselic mentioned this pull request Jan 2, 2026
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F-extern_item_impls `#![feature(extern_item_impls)]` S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue.

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Hundreds of missing stability attribute errors with trivial Externally Implementable Item (eii) function in library/std

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