process: improve process.cwd() error message #1802

Job	Run time
Build slim tarball	1m 29s
x86_64-darwin: with shared libraries	50m 9s
aarch64-darwin: with shared libraries	25m 7s
aarch64-linux: with shared libraries	25m 4s
x86_64-linux: with shared libraries	30m 27s
	2h 12m 16s

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