sg: sg setup deadlocks on Arch Linux

[LawnGnome]

• Platform information: Arch Linux

Steps to reproduce:

1. Run sg setup (or sg setup -c).

Expected behavior:

No hang.

Actual behavior:

sg hangs after displaying the initial progress tree.

This appears to be some sort of deadlock in the check concurrency — manually patching the runner concurrency to be 1 instead of 10 allows it to proceed as expected. An obvious workaround for now would be to drop the default concurrency on Linux, but I would like to get some input and understand what's causing the deadlock a little better before doing that.

[bobheadxi]

could this have been caused by the issue fixed in https://github.com/sourcegraph/sourcegraph/pull/38878 ?

[bobheadxi]

Alternatively, would be happy to accept a PR to configure the concurrency via flags!

[sqs]

Check if https://github.com/sourcegraph/sourcegraph/pull/42031 fixed it! 🤞

[garythung]

I'm still getting this hanging on Ubuntu 22.04. Tried the prod sg download, and locally built sg.