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CTFE: avoid emitting a hard error on generic normalization failures

beta-acceptedAccepted for backporting to the compiler in the beta channel.Accepted for backporting to the compiler in the beta channel.

beta-nominatedNominated for backporting to the compiler in the beta channel.Nominated for backporting to the compiler in the beta channel.

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 149501

#149501 In rust-lang/rust;

· by lcnr was closed on Dec 4, 2025

·  

1.93.0

move GAT inference prevention hack

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Merged (completed).

rust-lang/rustnumber 148865

#148865 In rust-lang/rust;

· by lcnr was closed on Nov 17, 2025

·  

1.93.0

TypeRelating emit WellFormed, not generalize

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Open (in progress).

rust-lang/rustnumber 148823

#148823 In rust-lang/rust;

· lcnr opened on Nov 11, 2025

fix CI for <code>nightly</code> PRs not targeting <code>master</code> anymore

A-CIArea: Our Github Actions CIArea: Our Github Actions CI

A-testsuiteArea: The testsuite used to check the correctness of rustcArea: The testsuite used to check the correctness of rustc

T-infraRelevant to the infrastructure team, which will review and decide on the PR/issue.Relevant to the infrastructure team, which will review and decide on the PR/issue.

Status: Closed (abandoned).

rust-lang/rustnumber 148784

#148784 In rust-lang/rust;

· by lcnr was closed on Nov 10, 2025

add test for assoc type norm wf check

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Merged (completed).

rust-lang/rustnumber 148783

#148783 In rust-lang/rust;

· by lcnr was closed on Nov 11, 2025

·  

1.93.0

don't completely reset <code>HeadUsages</code>

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 148649

#148649 In rust-lang/rust;

· by lcnr was closed on Nov 9, 2025

·  

1.93.0

add logging to <code>fudge_inference_if_ok</code>

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 148468

#148468 In rust-lang/rust;

· by lcnr was closed on Nov 4, 2025

·  

1.93.0

remove unnecessary fudge_inference

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Closed (abandoned).

rust-lang/rustnumber 148327

#148327 In rust-lang/rust;

· by lcnr was closed on Oct 31, 2025

remove support for <code>typeof</code>

A-tidyArea: The tidy toolArea: The tidy tool

I-lang-radarItems that are on lang's radar and will need eventual work or consideration.Items that are on lang's radar and will need eventual work or consideration.

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

S-waiting-on-MCPStatus: PR has a compiler MCP and is waiting for the compiler MCP to complete.Status: PR has a compiler MCP and is waiting for the compiler MCP to complete.

T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

T-clippyRelevant to the Clippy team.Relevant to the Clippy team.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-rustfmtRelevant to the rustfmt team, which will review and decide on the PR/issue.Relevant to the rustfmt team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Merged (completed).

rust-lang/rustnumber 148256

#148256 In rust-lang/rust;

· by lcnr was closed on Nov 27, 2025

·  

1.93.0

no wf obligations in generalize

perf-regressionPerformance regression.Performance regression.

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Draft (not ready).

rust-lang/rustnumber 148244

#148244 In rust-lang/rust;

· lcnr opened on Oct 29, 2025

split definition and use site hidden tys

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Merged (completed).

rust-lang/rustnumber 148170

#148170 In rust-lang/rust;

· by lcnr was closed on Nov 2, 2025

·  

1.93.0

AliasRelate: don't discard constraints on overflow

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver)The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Draft (not ready).

rust-lang/rustnumber 148069

#148069 In rust-lang/rust;

· lcnr opened on Oct 24, 2025