Question about perl while bootstrapping gcc

[Dominique Dhumieres]

Hi!

I use to build gcc with a command line such as

make -j2 >& somelogfile &

I recently found that if I logout, the build fails with

perl: no user 501

Is this a bug or a feature? In the former case I'll open a PR.
In the later is it documented somewhere that you should not logout
while building gcc? If yes, is it possible to have a pointer?

TIA

Dominique