Commit

Message guideline

Title format

Use "component: Brief summary" format for the commit title.

Examples:

• "completions: Add support for keyword argument completion"
• "diagnostics: Fix false positive on unused variable"
• "ci: Update GitHub Actions workflow"

Body

Provide a brief prose summary of the purpose of the changes made. Use backticks for code elements (function names, variables, file paths, etc.).

Line length

Ensure the maximum line length never exceeds 72 characters.

GitHub references

When referencing external GitHub PRs or issues, use proper GitHub interlinking format: "owner/repo#123"

Co-author trailer

If you wrote code yourself, include a co-author trailer at the end of the commit message, e.g.: Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> (adjust the model name as appropriate).

However, when simply asked to write a commit message (without having written the code), there's no need to add that trailer.

Example

analyzer: FieldError & BoundsError analysis

Add static analysis for field access errors by hooking into
`CC.builtin_tfunction` to intercept `getfield`, `setfield!`,
`fieldtype`, and `getglobal` calls.

Two new report types are introduced:
- `FieldErrorReport` (`inference/field-error`): reported when accessing
  a non-existent field by name
- `BoundsErrorReport` (`inference/bounds-error`): reported when
  accessing a field by an out-of-bounds integer index

Note that the `inference/bounds-error` diagnostic is reported when code
attempts to access a struct field using an integer index that is out of
bounds, such as `getfield(x, i)` or tuple indexing `tpl[i]`, and not
reported for arrays, since the compiler doesn't track array shape
information.

Reports from invalid `setfield!` and `fieldtype`, and general invalid
argument types are left as future TODO.

Also adjusts concrete evaluation logic to enable ad-hoc constant
propagation after failed concrete evaluation for better accuracy.

---

- Closes aviatesk/JETLS.jl#392

Safety guideline

See the "Git operations" section in CLAUDE.md.

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