fix: return numeric blksize and blocks from asar fs.stat#50825
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Previously, `fs.stat` on files inside `.asar` archives returned `undefined` for `blksize` and `blocks`, violating the Node.js API contract where these fields must be `number | bigint`. Use `4096` for `blksize` (matching the convention used by `memfs` and the proposed `node:vfs` module in nodejs/node#61478) and compute `blocks` as `ceil(size / 512)` (standard 512-byte block units). Fixes #42686 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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dsanders11
approved these changes
Apr 9, 2026
codebytere
approved these changes
Apr 9, 2026
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Release Notes Persisted
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This was referenced Apr 10, 2026
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I have automatically backported this PR to "40-x-y", please check out #50875 |
Contributor
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I have automatically backported this PR to "41-x-y", please check out #50876 |
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I have automatically backported this PR to "42-x-y", please check out #50877 |
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Description of Change
fs.staton files inside.asararchives returnedundefinedforblksizeandblocks, breaking the soundness ofnode:fstypes expectingnumber | bigint.This change sets
blksize: 4096and computesblocks: Math.ceil(size / 512). This happens to align with the proposednode:vfsmodule (nodejs/node#61478). Added a test to continue validating the general propertytypeof asar[key] === typeof real[key].Fixes #42686
Checklist
npm testpassesRelease Notes
Notes: Fixed
fs.staton files inside asar archives returningundefinedforblksizeandblocksinstead of numeric values.