jimp-dev/jimp

zlib error when trying to write many things in an async function

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#929 opened on Aug 22, 2020

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 (2 comments) (2 reactions) (0 assignees)JavaScript (785 forks)batch import
bughelp wanted

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Description

Code:

https://pastebin.com/RZjLU1WA

Error:

{ Error: unexpected end of file at Zlib.zlibOnError [as onerror] (zlib.js:164:17) at Inflate._processChunk (/home/branch/node_modules/pngjs/lib/sync-inflate.js:110:28) at zlibBufferSync (/home/branch/node_modules/pngjs/lib/sync-inflate.js:151:17) at inflateSync (/home/branch/node_modules/pngjs/lib/sync-inflate.js:155:10) at module.exports (/home/branch/node_modules/pngjs/lib/parser-sync.js:85:20) at Object.exports.read [as image/png] (/home/branch/node_modules/pngjs/lib/png-sync.js:10:10) at Jimp.parseBitmap (/home/branch/node_modules/@jimp/core/dist/utils/image-bitmap.js:196:53) at Jimp.parseBitmap (/home/branch/node_modules/@jimp/core/dist/index.js:431:32) at /home/branch/node_modules/@jimp/core/dist/index.js:373:15 at FSReqWrap.readFileAfterClose [as oncomplete] (internal/fs/read_file_context.js:53:3) errno: -5, code: 'Z_BUF_ERROR', methodName: 'constructor' }

Contributor guide

Research direction
Investigate the zlib error when using asynchronous operations in Jimp, specifically focusing on the interaction between async file writing and PNG compression. Check if the buffer is being freed prematurely or if there's a race condition.
Tech stack
javascript
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
Node.js
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65