GNU Parallel Bug Reports Exit status for semaphore mode

[Gregor Jasny]

Hello,

I'm wondering how top propagate errors in semaphore mode. I'd expect 
that any calls of "parallel" either when submitting jobs or when waiting 
for the result return a non-zero exit code.

This is my test code. Here I'd expect the last line to return "failure"

#!/bin/bash

function faillater {
    sleep 5
    exit 1
}

export -f faillater

./parallel --semaphore --halt-on-error 1 --jobs 2 -- faillater
./parallel --semaphore --halt-on-error 2 --jobs 2 -- sleep 10
./parallel --semaphore --halt-on-error 1 --jobs 2 --wait && echo success 
|| echo failure

I can see that implementing or defining error handling is problematic 
especially because returning the error is deferred. But nevertheless 
error handling is important and it would be nice if parallel could be 
helpful in that area.

Thanks,
Gregor