fs: fix process crash in fs.promises.writeFile #3421

Job	Run time
Build slim tarball	2m 24s
aarch64-linux: with shared libraries	29m 41s
aarch64-darwin: with shared libraries	44m 15s
x86_64-linux: with shared libraries	34m 20s
x86_64-darwin: with shared libraries	40m 3s
	2h 30m 43s

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