Memory Leak by using node:zlib with DENO 2.4.3

[pascalav]

Version: Deno 2.4.3

import * as ZLib from "node:zlib";

const file = 'myfile.html';
const data = await Deno.readFile(file);
const br = ZLib.brotliCompressSync(data, { params: { [ZLib.constants.BROTLI_PARAM_QUALITY]: 5 } });
await Deno.writeFile(`${file}.br`, br);

The code works perfectly under Deno 2.4.2.
Under Deno 2.4.3, the following error messages appear:

leaking memory block of length 32768 element size: 2 
leaking memory block of length 8388608 element size: 4 
leaking memory block of length 31056 element size: 1 
leaking memory block of length 23301 element size: 16 
leaking memory block of length 62621 element size: 1

After downgrading to 2.4.2, it works again.
I have not yet tested the asynchronous version.
Edit: Same problem with promisify(ZLib.brotliCompress);

I use Linux Kubuntu 25.04.

[ilbertt]

I've upgraded to deno v2.4.4, which apparently contains the fix from #30277, but I'm still getting logs like:

leaking memory block of length 2551 element size: 1
leaking memory block of length 2048 element size: 4
leaking memory block of length 2551 element size: 1
leaking memory block of length 2048 element size: 4
leaking memory block of length 2048 element size: 4
leaking memory block of length 2048 element size: 4
leaking memory block of length 2048 element size: 4

In my use case (uploading Brotli-compressed files to a static web hosting), this results in the same errors encountered in #30306.

[bartlomieju]

@ilbertt can you please open a new issue with a reproduction that causes these logs to be printed?

[mintydev789]

@bartlomieju I opened it here: #30430. Any chance this could be fixed soon? My website currently has no styling due to this bug.