Get `ERROR: julia: -t,--threads=<n>[,auto|<m>]; n must be an integer >= 1` when running test

General Usage
1

Not sure what to do here. I have a laptop I haven’t really worked much on for like 6 months. Running Julia on it has been fine. However, now I tried to run the tests of a package that I develop. I activate the environment and do

] test

And I get this

ERROR: julia: -t,--threads=<n>[,auto|<m>]; n must be an integer >= 1

as output.

Just running Julia as normal does not yield any problem. This happens when I run on master (so nothing I have added to the package, this just to work on my desktop). I have tried restarting the computer and it was fine.

This is on Julai 1.11.5 and Ubuntu 22.04

2

Does that mean your issue goes away after rebooting?

In any case, this sounds to me like you have (the package has) a settings/preferences file/variable somewhere setting the number of threads incorrectly. Perhaps in an older version of Julia you could use -t 0 for what’s now -t auto?

3

I had this error, too, after upgrading to v1.11.5 using juliaup. I use vs code on windows. Number of threads was reported as (blank). To fix, I had to manually set the number of threads myself. Then it went back to normal. .

4
5

@Torkel Are you also using VS Code?

6

Yes, I was in VSCode. Thanks for the help, I changed to

    "julia.NumThreads": 2

(no idea what is best really)
and the tests can run now