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fs: fix do_not_throw_error argument index in sync fstat - #66637

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daniellockyer:fs-fstat-sync-arg-index

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The synchronous branch of the fstat binding read its do_not_throw_error flag from args[2], which is always undefined on that branch, so the flag was ignored and the binding always threw.

Read the flag from args[3] as documented, and restore tryStatSync() to closing the file descriptor it owns before re-throwing the fstat error, which was its behavior before the flag was introduced.

Refs: #49868
Assisted-by: MiniMax M3.1 Flash Preview + Opus 5.5

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. fs Issues and PRs related to file-system APIs and the fs module. needs-ci PRs that need a full CI run. labels Oct 10, 2026
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The synchronous branch of the fstat binding read its
do_not_throw_error flag from args[2], which is always undefined on
that branch, so the flag was ignored and the binding always threw.

Read the flag from args[3] as documented, and restore tryStatSync()
to closing the file descriptor it owns before rethrowing the fstat
error, which was its behaviour before the flag was introduced.

Refs: nodejs#49868
Assisted-by: MiniMax M3.1 Flash Preview + Opus 5.5
Signed-off-by: Daniel Lockyer <hi@daniellockyer.com>
@daniellockyer
daniellockyer force-pushed the fs-fstat-sync-arg-index branch from 2ea782d to 593b5bd Compare October 10, 2026 07:09
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