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Markdown: non-idempotent indent drift (+4/run) for wrapped paragraph under a task-list item (regression in 3.9.0) #19644

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Description

@leaysgur

Prettier v3.9.5
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--parser markdown

Input:

- [x] short first line.

      second paragraph at six spaces that wraps
      onto another line here.

Output:

- [x] short first line.

      second paragraph at six spaces that wraps
          onto another line here.

Second Output:

- [x] short first line.

      second paragraph at six spaces that wraps
              onto another line here.

Expected output:

Input unchanged. The same as v3.8.5.

Why?

Bisected across releases: 3.8.0 ~ 3.8.5 are idempotent, 3.9.0 drifts.

Refs: oxc-project/oxc#24574

Activity

  1. added
    help wantedWe're a small group who can't get to every issue promptly. We’d appreciate help fixing this issue!
    on Jul 16, 2026
  2. added theissue type on Jul 16, 2026
  3. locked as resolved and limited conversation to collaborators on Oct 16, 2026
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    help wantedWe're a small group who can't get to every issue promptly. We’d appreciate help fixing this issue!lang:markdownIssues affecting Markdownlocked-due-to-inactivityPlease open a new issue and fill out the template instead of commenting.

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