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do not merge

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Replace FILLME with actual PR link

Comment thread doc/api/fs.md
added: v10.0.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/fs.md
added: v10.0.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/FILLME

Comment thread doc/api/fs.md
added: v10.0.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/fs.md
added: v10.0.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/buffer.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/buffer.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/buffer.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/buffer.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/fs.md
Comment thread doc/api/buffer.md
<!-- YAML
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/fs.md
added: v10.0.0
changes:
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/fs.md
pr-url: https://github.com/nodejs/node/pull/31553
description: Exposed as `require('fs/promises')`.
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

Comment thread doc/api/fs.md
pr-url: https://github.com/nodejs/node/pull/50095
description: The `flush` option is now supported.
- version: REPLACEME
pr-url: https://github.com/nodejs/node/pull/FILLME
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Replace FILLME with PR number 2

Suggested change
pr-url: https://github.com/nodejs/node/pull/FILLME
pr-url: https://github.com/nodejs/node/pull/2

LiviaMedeiros pushed a commit that referenced this pull request Jun 5, 2026
This function call can fail with `Z_VERSION_ERROR` if the compiled
library vs loaded library mismatched in version number or in
stream structure size.
In those cases, zlib doesn't initialize the `strm_.msg` field to
null. Therefore, when a `CompressionError` object is created via
`ErrorForMessage()`, it can read a stale or uninitialized `strm_.msg`
pointer that will cause a crash.

Example ASAN report:
```
AddressSanitizer: SEGV on unknown address
    #0 __strlen_avx2
        string/../sysdeps/x86_64/multiarch/strlen-avx2.S:76
    #1 strlen (/work/node/out/Debug/node+0x1a42ab7)
    #2 v8::(anonymous namespace)::StringLength(char const*)
        /work/node/out/../deps/v8/src/api/api.cc:7581:16
    #3 v8::(anonymous namespace)::StringLength(unsigned char const*)
        /work/node/out/../deps/v8/src/api/api.cc:7587:10
    #4 v8::String::NewFromOneByte(v8::Isolate*,
        unsigned char const*, v8::NewStringType, int)
        /work/node/out/../deps/v8/src/api/api.cc:7677:3
    nodejs#5 node::OneByteString(v8::Isolate*,
        char const*, int, v8::NewStringType)
        /work/node/out/../src/util-inl.h:166:10
    nodejs#6 node::(anonymous namespace)::CompressionStream<
        node::(anonymous namespace)::ZlibContext>
        ::EmitError(node::(anonymous namespace)
        ::CompressionError const&)
        /work/node/out/../src/node_zlib.cc:565:7
    nodejs#7 node::(anonymous namespace)::CompressionStream<
        node::(anonymous namespace)::ZlibContext>
        ::CheckError()
        /work/node/out/../src/node_zlib.cc:519:5
    nodejs#8 node::(anonymous namespace)::CompressionStream<
        node::(anonymous namespace)::ZlibContext>
        ::AfterThreadPoolWork(int)
        /work/node/out/../src/node_zlib.cc:543:10
    nodejs#9 node::ThreadPoolWork::ScheduleWork()
        ::'lambda'(uv_work_s*, int)
        ::operator()(uv_work_s*, int) const
        /work/node/out/../src/threadpoolwork-inl.h:57:15
    nodejs#10 node::ThreadPoolWork::ScheduleWork()
        ::'lambda'(uv_work_s*, int)
        ::__invoke(uv_work_s*, int)
        /work/node/out/../src/threadpoolwork-inl.h:48:7
    nodejs#11 uv__work_done /work/libuv-1.51.0/src/threadpool.c:330:5
    nodejs#12 uv__async_io.part.0
        /work/libuv-1.51.0/src/unix/async.c:208:5
```

Signed-off-by: ndossche <nora.dossche@ugent.be>
PR-URL: nodejs#63476
Reviewed-By: Anna Henningsen <anna@addaleax.net>
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