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TAIT feature is broken #126387

@Sherlock-Holo

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@Sherlock-Holo

Code

try to build my project with nightly rust

  • clone this project
  • checkout to commit 3081600eb64eb3ebf4432b85db58fea85072fc6e
  • cd server
  • cargo clippy or cargo build

I expected to see this happen: build success

Instead, this happened: build failed, with error message like

error: item does not constrain `server::TokioTcpAcceptor::{opaque#0}`, but has it in its signature --> server/src/server.rs:61:18 | 61 | pub async fn start(self) -> Result<(), Error> { | ^^^^^ | = note: consider moving the opaque type's declaration and defining uses into a separate module note: this opaque type is in the signature --> server/src/server.rs:19:25 | 19 | type TokioTcpAcceptor = impl Stream<Item = io::Result<TokioTcp>> + Send + Unpin; 

Version it worked on

It most recently worked on:

Version with regression

cargo bisect-rustc report

cking nightly-2024-06-13 from the currently installed default nightly toolchain as the last failure checking the start range to find a passing nightly installing nightly-2024-06-13 testing... RESULT: nightly-2024-06-13, ===> Yes uninstalling nightly-2024-06-13 checking the start range to find a passing nightly installing nightly-2024-06-11 rust-std-nightly-x86_64-unknown-linux-gnu: 26.72 MB / 26.72 MB [================================================================================] 100.00 % 3.71 MB/s testing... RESULT: nightly-2024-06-11, ===> No uninstalling nightly-2024-06-11 checking the end range to verify it does not pass installing nightly-2024-06-13 testing... RESULT: nightly-2024-06-13, ===> Yes uninstalling nightly-2024-06-13 1 versions remaining to test after this (roughly 1 steps) installing nightly-2024-06-12 rust-std-nightly-x86_64-unknown-linux-gnu: 26.66 MB / 26.66 MB [================================================================================] 100.00 % 3.65 MB/s testing... RESULT: nightly-2024-06-12, ===> No uninstalling nightly-2024-06-12 searched toolchains nightly-2024-06-11 through nightly-2024-06-13 checking last toolchain to determine final result installing nightly-2024-06-13 testing... uninstalling nightly-2024-06-13 ******************************************************************************** Regression in nightly-2024-06-13 ******************************************************************************** fetching https://static.rust-lang.org/dist/2024-06-12/channel-rust-nightly-git-commit-hash.txt nightly manifest 2024-06-12: 40 B / 40 B [======================================================================================================] 100.00 % 1.36 MB/s converted 2024-06-12 to d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04 fetching https://static.rust-lang.org/dist/2024-06-13/channel-rust-nightly-git-commit-hash.txt nightly manifest 2024-06-13: 40 B / 40 B [====================================================================================================] 100.00 % 846.88 KB/s converted 2024-06-13 to 8337ba9189de188e2ed417018af2bf17a57d51ac looking for regression commit between 2024-06-12 and 2024-06-13 fetching (via remote github) commits from max(d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04, 2024-06-10) to 8337ba9189de188e2ed417018af2bf17a57d51ac ending github query because we found starting sha: d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04 get_commits_between returning commits, len: 11 commit[0] 2024-06-11: Auto merge of #125174 - nnethercote:less-ast-pretty-printing, r=petrochenkov commit[1] 2024-06-11: Auto merge of #126284 - jieyouxu:rollup-nq7bf9k, r=jieyouxu commit[2] 2024-06-12: Auto merge of #123508 - WaffleLapkin:never-type-2024, r=compiler-errors commit[3] 2024-06-12: Auto merge of #126130 - compiler-errors:goal-relations, r=lcnr commit[4] 2024-06-12: Auto merge of #126290 - weihanglo:update-cargo, r=weihanglo commit[5] 2024-06-12: Auto merge of #113169 - oli-obk:tait_must_be_constrained_if_in_sig, r=lcnr commit[6] 2024-06-12: Auto merge of #126319 - workingjubilee:rollup-lendnud, r=workingjubilee commit[7] 2024-06-12: Auto merge of #125141 - SergioGasquez:feat/no_std-xtensa, r=davidtwco commit[8] 2024-06-12: Auto merge of #126332 - GuillaumeGomez:rollup-bu1q4pz, r=GuillaumeGomez commit[9] 2024-06-12: Auto merge of #126273 - pietroalbini:pa-bootstrap-update, r=Mark-Simulacrum commit[10] 2024-06-12: Auto merge of #126345 - compiler-errors:rollup-lue8u92, r=compiler-errors validated commits found, specifying toolchains checking the start range to verify it passes installing d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04 rust-std-nightly-x86_64-unknown-linux-gnu: 27.56 MB / 27.56 MB [================================================================================] 100.00 % 3.99 MB/s testing... RESULT: d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04, ===> No uninstalling d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04 checking the end range to verify it does not pass installing 8337ba9189de188e2ed417018af2bf17a57d51ac rust-std-nightly-x86_64-unknown-linux-gnu: 27.60 MB / 27.60 MB [================================================================================] 100.00 % 3.59 MB/s testing... RESULT: 8337ba9189de188e2ed417018af2bf17a57d51ac, ===> Yes uninstalling 8337ba9189de188e2ed417018af2bf17a57d51ac 5 versions remaining to test after this (roughly 3 steps) installing 02c7a5921e3de5c2b3ecb2e0082c1dafce0729a1 rust-std-nightly-x86_64-unknown-linux-gnu: 27.60 MB / 27.60 MB [================================================================================] 100.00 % 4.01 MB/s testing... RESULT: 02c7a5921e3de5c2b3ecb2e0082c1dafce0729a1, ===> Yes uninstalling 02c7a5921e3de5c2b3ecb2e0082c1dafce0729a1 3 versions remaining to test after this (roughly 2 steps) installing 9a7bf4ae947feddac27007cbe26d161f4ff5a910 rust-std-nightly-x86_64-unknown-linux-gnu: 27.59 MB / 27.59 MB [================================================================================] 100.00 % 3.84 MB/s testing... RESULT: 9a7bf4ae947feddac27007cbe26d161f4ff5a910, ===> No uninstalling 9a7bf4ae947feddac27007cbe26d161f4ff5a910 2 versions remaining to test after this (roughly 2 steps) installing 76c73827dcd0b363e60b22c3cef64bde4171bf17 rust-std-nightly-x86_64-unknown-linux-gnu: 27.58 MB / 27.58 MB [================================================================================] 100.00 % 3.84 MB/s testing... RESULT: 76c73827dcd0b363e60b22c3cef64bde4171bf17, ===> No uninstalling 76c73827dcd0b363e60b22c3cef64bde4171bf17 1 versions remaining to test after this (roughly 1 steps) installing bdb1b7f5d9715cc96cb437134eff93fa229defd1 rust-std-nightly-x86_64-unknown-linux-gnu: 27.60 MB / 27.60 MB [================================================================================] 100.00 % 4.18 MB/s testing... RESULT: bdb1b7f5d9715cc96cb437134eff93fa229defd1, ===> No uninstalling bdb1b7f5d9715cc96cb437134eff93fa229defd1 searched toolchains d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04 through 8337ba9189de188e2ed417018af2bf17a57d51ac ******************************************************************************** Regression in 02c7a5921e3de5c2b3ecb2e0082c1dafce0729a1 ******************************************************************************** Attempting to search unrolled perf builds ERROR: error: url <https://api.github.com/repos/rust-lang/rust/issues/113169/comments> response 403 Forbidden: {"message":"API rate limit exceeded for <MY-IP> (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)","documentation_url":"https://docs.github.com/rest/overview/resources-in-the-rest-api#rate-limiting"} ================================================================================== = Please file this regression report on the rust-lang/rust GitHub repository = = New issue: https://github.com/rust-lang/rust/issues/new = = Known issues: https://github.com/rust-lang/rust/issues = = Copy and paste the text below into the issue report thread. Thanks! = ================================================================================== searched nightlies: from nightly-2024-06-11 to nightly-2024-06-13 regressed nightly: nightly-2024-06-13 searched commit range: https://github.com/rust-lang/rust/compare/d0227c6a19c2d6e8dceb87c7a2776dc2b10d2a04...8337ba9189de188e2ed417018af2bf17a57d51ac regressed commit: https://github.com/rust-lang/rust/commit/02c7a5921e3de5c2b3ecb2e0082c1dafce0729a1 <details> <summary>bisected with <a href='https://github.com/rust-lang/cargo-bisect-rustc'>cargo-bisect-rustc</a> v0.6.8</summary> Host triple: x86_64-unknown-linux-gnu Reproduce with: ```bash cargo bisect-rustc 
```

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    C-discussionCategory: Discussion or questions that doesn't represent real issues.F-type_alias_impl_trait`#[feature(type_alias_impl_trait)]`

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