The MSRV is 1.90, which is what the tree-sitter the parser wants requires

[HackingGate]

Raises the floor so #151 can land.

tree-sitter 0.27.0 and tree-sitter-language 0.1.8 declare rust-version = "1.90", and the MSRV job refuses them on a floor of 1.88:

error: rustc 1.88.0 is not supported by the following packages:
  tree-sitter@0.27.0          requires rustc 1.90
  tree-sitter-language@0.1.8  requires rustc 1.90

That job is not a lint. It compiles the crate on the version Cargo.toml declares rather than on whatever stable is that week, which is the whole reason the number is worth writing down -- so raising it is a claim CI checks rather than one it takes on trust.

Raising the floor is a decision about who can build uphold, not a dependency bump, so it is its own commit rather than a line inside dependabot's.

Both copies move together

Cargo.toml's rust-version and toolchain.toml's rustc want. Cargo cannot read the preflight's manifest and the preflight cannot read cargo's, which is the only reason the number exists twice; tests/test_toolchain.py refuses a tree where one moved without the other, and it passes here.

Verified on the floor, not on stable

$ cargo +1.90 check --locked --all-targets     # this tree
Finished `dev` profile

$ # with #151's Cargo.toml and Cargo.lock applied on top:
$ cargo +1.90 check --all-targets
Compiling tree-sitter-language v0.1.8
Compiling tree-sitter v0.27.0
Finished `dev` profile

$ cargo test                                    # with tree-sitter 0.27
807 passed, 0 failed

So 1.90 is the number that lets #151 through, and not a round one chosen above it. The tree-sitter grammars this crate embeds parse the same on 0.27 as on 0.26 -- the suite covers the comment-kind distinctions that depend on them, and none moved.

cargo fmt --check, cargo clippy --all-targets -- -D warnings, cargo run -- scan and the suite are clean on stable too.

https://claude.ai/code/session_01HertdiAvdNKGyjR91jvRUM

Summary by CodeRabbit

• Chores
  • Raised the minimum supported Rust version to 1.90.
  • Updated the development toolchain requirement to Rust 1.90.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 040c922f-680b-4913-9d2f-87230d9200b7

📥 Commits

Reviewing files that changed from the base of the PR and between 9359012 and bbac958.

📒 Files selected for processing (2)

• Cargo.toml
• toolchain.toml

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The crate's minimum supported Rust version changes from 1.88 to 1.90. The package manifest comment now cites the dependency requirements, and the toolchain compiler constraint matches the new version.

Changes

Rust MSRV alignment

Layer / File(s)	Summary
Update Rust version floor Cargo.toml, toolchain.toml	The package requires Rust 1.90. The manifest comment identifies the dependency floors, and the toolchain requires rustc >=1.90.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to bbac9

The project now requires Rust 1.90 consistently across package metadata and toolchain configuration. No current merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title identifies the main change: raising the MSRV to 1.90 for tree-sitter compatibility. The wording is grammatically awkward but remains specific and related to the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch msrv-1-90

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.30%. Comparing base (9359012) to head (bbac958).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #155      +/-   ##
==========================================
+ Coverage   93.26%   93.30%   +0.03%     
==========================================
  Files          38       38              
  Lines       15276    15276              
==========================================
+ Hits        14247    14253       +6     
+ Misses       1029     1023       -6     

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