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bors 6e23095adf Auto merge of #140145 - Zoxc:job-server-proxy, r=SparrowLii 
Add a jobserver proxy to ensure at least one token is always held

This adds a jobserver proxy to ensure at least one token is always held by `rustc`. Currently with `-Z threads` `rustc` can temporarily give up all its tokens, causing `cargo` to spawn additional `rustc` instances beyond the job limit.

The current behavior causes an issue with `cargo fix` which has a global lock preventing concurrent `rustc` instances, but it also holds a jobserver token, causing a deadlock when `rustc` gives up its token. That is fixed by this PR.

Fixes https://github.com/rust-lang/rust/issues/67385.
Fixes https://github.com/rust-lang/rust/issues/133873.
Fixes https://github.com/rust-lang/rust/issues/140093.
2025-05-01 04:11:52 +00:00
..
src Auto merge of #140145 - Zoxc:job-server-proxy, r=SparrowLii 2025-05-01 04:11:52 +00:00
Cargo.toml Revert "Use workspace lints for crates in compiler/ #138084" 2025-03-10 18:12:47 +08:00
messages.ftl AsyncDrop implementation using shim codegen of async_drop_in_place::{closure}, scoped async drop added. 2025-04-28 16:23:13 +07:00
README.md

README.md

For more information about how rustc works, see the rustc dev guide.