cargo-semver-checks 0.46.0

v0.46.0

on Rust Cargo

In this release

• 45 new lints — our biggest release ever!
• Spotlight: Exponential growth continued — 2025 Year in Review

✨ This adorable animation was made by @dekirisu ✨

This release requires Rust 1.90+ both to install (MSRV) and at runtime. Future releases will require Rust 1.91+.

This is the last release to support git-based package indexes. Future releases will require the use of a sparse index for linting against package versions published to a registry.

Spotlight: Exponential growth continued — 2025 Year in Review

Please check out our year in review post for a look at what we accomplished in 2025, and what lies ahead.

One of the highlights: in 2025 we more than doubled the number of lints, from 120 on January 1 to 242 lints on December 31!

New lints

This release ships with 245 lints in total. We added 35 new SemVer-major deny-by-default lints, 2 major warn-by-default lints, and 8 new allow-by-default lints for additive-only changes.

SemVer-major, deny-by-default

New trait impls

• copy_impl_added

Type kind changes (enum became struct etc.)

• enum_changed_kind
• trait_changed_kind
• union_changed_kind
• union_changed_to_incompatible_struct
• union_with_multiple_pub_fields_changed_to_struct

Cargo feature graph removal

• feature_no_longer_enables_feature

Exported functions (FFI) signature/ABI/target features

• exported_function_abi_no_longer_unwind
• exported_function_abi_now_unwind
• exported_function_parameter_count_changed
• exported_function_return_value_added
• exported_function_now_returns_unit
• exported_function_target_feature_added
• exported_function_requires_more_target_features

Method ABI/unwind/symbol changes (inherent + trait)

• inherent_method_changed_abi
• inherent_method_no_longer_unwind
• inherent_method_now_unwind
• trait_method_changed_abi
• trait_method_no_longer_unwind
• trait_method_now_unwind
• method_export_name_changed

Inherent method receiver changes

• method_no_longer_has_receiver
• method_receiver_mut_ref_became_owned
• method_receiver_ref_became_mut
• method_receiver_ref_became_owned
• method_receiver_type_changed

Trait method receiver changes

• trait_method_no_longer_has_receiver
• trait_method_receiver_added
• trait_method_receiver_mut_ref_became_owned
• trait_method_receiver_mut_ref_became_ref
• trait_method_receiver_owned_became_mut_ref
• trait_method_receiver_owned_became_ref
• trait_method_receiver_ref_became_mut
• trait_method_receiver_ref_became_owned
• trait_method_receiver_type_changed

SemVer-major, warn-by-default

Sealed trait method receiver changes

• pub_api_sealed_trait_method_receiver_added
• pub_api_sealed_trait_method_receiver_mut_ref_became_ref

Allow-by-default lints for additive-only changes

Public struct additions / exhaustiveness

• exhaustive_struct_added
• exhaustive_struct_with_private_fields_added
• exhaustive_struct_with_doc_hidden_fields_added
• non_exhaustive_struct_added

Cargo feature graph expansion

• feature_newly_enables_feature

Associated items added on inherent impls

• inherent_associated_pub_const_added

#[must_use] removals

• inherent_method_must_use_removed
• trait_must_use_removed

All merged PRs

• Keep the GitHub credentials configuration, just override token. by @obi1kenobi in #1487
• Drop support for Rust 1.89. New MSRV is 1.90. by @obi1kenobi in #1489
• Weekly cargo update of dependencies by @obi1kenobi in #1490
• new lint: method_receiver_ref_became_owned by @lovelindhoni in #1263
• Add method_receiver_ref_became_mut lint. by @obi1kenobi in #1492
• Add method_receiver_mut_ref_became_owned lint. by @obi1kenobi in #1493
• Add method_receiver_type_changed lint. by @obi1kenobi in #1494
• Add method_no_longer_has_receiver lint; bugfix in param count lint. by @obi1kenobi in #1496
• Replace deprecated cargo_bin usage in tests by @obi1kenobi in #1495
• Checkout with token to make tags and releases. by @obi1kenobi in #1488
• Fix false-positive in trait_method_parameter_count_changed lint. by @obi1kenobi in #1498
• Add lints for breaking changes to general-case trait method receivers. by @obi1kenobi in #1499
• Add trait_method_no_longer_has_receiver lint. by @obi1kenobi in #1500
• Add remaining trait receiver lints. by @obi1kenobi in #1501
• Remove expression from insta output in tests. by @CLIDragon in #1497
• Match up receivers in param-count-changed lints to avoid false-positives by @obi1kenobi in #1502
• Weekly cargo update of dependencies by @obi1kenobi in #1503
• Add lints for adding receivers to trait methods. by @obi1kenobi in #1504
• Clean up ABI-related lints to make them use latest schema abilities. by @obi1kenobi in #1505
• Add method_export_name_changed lint. by @obi1kenobi in #1506
• Add new lints for ABI-exported functions. by @obi1kenobi in #1507
• Add ABI change lints for inherent methods and trait methods. by @obi1kenobi in #1508
• Weekly cargo update of dependencies by @obi1kenobi in #1510
• Bump actions/checkout from 5 to 6 by @dependabot[bot] in #1511
• Add support for rustdoc v57 via trustfall_rustdoc v0.37.0. by @obi1kenobi in #1512
• Update to ron v0.12.0. by @obi1kenobi in #1513
• Add lint trait_must_use_removed by @Nalin-khanna in #1515
• Inherent method must_use removed by @Nalin-khanna in #1516
• Add next Rust minor to test matrix by @obi1kenobi in #1518
• Bump actions/cache from 4 to 5 by @dependabot[bot] in #1521
• Bump actions/download-artifact from 6 to 7 by @dependabot[bot] in #1520
• Bump actions/upload-artifact from 5 to 6 by @dependabot[bot] in #1519
• Weekly cargo update of dependencies by @obi1kenobi in #1514
• Weekly cargo update of dependencies by @obi1kenobi in #1522
• Upgrade gix and tame-index to new majors. by @obi1kenobi in #1525
• Weekly cargo update of dependencies by @obi1kenobi in #1524
• Add exported_function_return_value_added lint. by @obi1kenobi in #1527
• Explain that negative tests w/ identical code are pointless. by @obi1kenobi in #1528
• Weekly cargo update of dependencies by @obi1kenobi in #1529
• Separate out "enum became struct/union/trait" from "enum missing" lint. by @obi1kenobi in #1530
• Add trait_changed_kind lint separate from trait_missing. by @obi1kenobi in #1531
• Add new lints for unions changing to other kinds of types. by @obi1kenobi in #1533
• Revert trait_missing trait public_api suppression gate by @obi1kenobi in #1532
• Improve src/lints/AGENTS.md based on latest lint-writing experience. by @obi1kenobi in #1534
• Add copy_impl_added lint. by @obi1kenobi in #1536
• Implement feature_no_longer_implies_feature lint. by @obi1kenobi in #1535
• Implement feature_newly_implies_feature lint. by @obi1kenobi in #1537
• Exhaustive struct added by @Nalin-khanna in #1538
• Weekly cargo update of dependencies by @obi1kenobi in #1539
• Use enables instead of implies terminology for features. by @obi1kenobi in #1540
• Weekly cargo update of dependencies by @obi1kenobi in #1542
• Non exhaustive struct added by @Nalin-khanna in #1541
• Weekly cargo update of dependencies by @obi1kenobi in #1544
• Weekly cargo update of dependencies by @obi1kenobi in #1545
• Add two new lints regarding additions of structs. by @Nalin-khanna in #1543
• Weekly cargo update of dependencies by @obi1kenobi in #1552
• fix feature escaping in bugreport snapshot by @GrigorenkoPV in #1548
• docs: mention running checks per target triple with --target by @dharmvr1 in #1547
• Add next Rust minor to test matrix by @obi1kenobi in #1554
• Add new minor lint for adding an inherent associated const to public API by @connor15mcc in #1551
• Weekly cargo update of dependencies by @obi1kenobi in #1556
• Release v0.46.0. by @obi1kenobi in #1557
• Add a manual release trigger. by @obi1kenobi in #1558

New Contributors

• @Nalin-khanna made their first contribution in #1515
• @GrigorenkoPV made their first contribution in #1548
• @dharmvr1 made their first contribution in #1547
• @connor15mcc made their first contribution in #1551

Full Changelog: v0.45.0...v0.46.0