* Zack Weinberg:

In particular, I really hope delayed errors *aren’t* ever reported
when you close a file descriptor that *isn’t* the last reference
to its open file description, because the thread-safe way to close
stdout without losing write errors[2] depends on that not happening.

[2] https://stackoverflow.com/a/50865617 (third code block)

Are you sure about that?  It means that errors are never reported if a
shell script redirects standard output over multiple commands.

Thanks,
Florian