Summary

oxfmt panics in sort_imports when a file contains a floating /** … */ JSDoc block (separated from the first import by a blank line) followed by two or more import statements.

Same panic site as #22354, but a distinct trigger that isn't covered by the fix in #22369 (which is shipped in 0.50.0).

Versions / env

• oxfmt 0.50.0 (released 2026-05-15)
• macOS 25.4.0, arm64, Node 24.15.0

Minimal repro

repro.ts — four lines is enough:

/** jsdoc */

import * as React from "react";
import { foo } from "bar";

$ oxfmt --threads 1 repro.ts
thread '<unnamed>' panicked at crates/oxc_formatter/src/ir_transform/sort_imports/source_line.rs:139:32:
`ImportDeclaration` must have a source

Bisected trigger

The panic requires all three:

So: JSDoc-style block comment + detached from the first import by a blank line + ≥ 2 imports.

The JSDoc body content doesn't matter (single-line /** x */ is enough). Multiline JSDoc with @see etc. behaves the same — that's just how I originally hit it in a real file.

Expected

Format without panicking — concretely, every ImportDeclaration reaching sort_imports/source_line.rs:139 should have its source set.

Related

• formatter: Ignore directive before import causes panic #22354 / fix(formatter/sort_imports): Handle ignore comment as boundary #22369 — same panic location, different trigger (ignore directive between imports). fix(formatter/sort_imports): Handle ignore comment as boundary #22369 is in 0.50.0 but doesn't cover this case.
• Likely fallout from the same import-run refactor in perf(formatter): process ImportDeclarations in a run #22079, as noted in formatter: Ignore directive before import causes panic #22354.