# Github actions StackOverflowError
**URL:** https://discourse.julialang.org/t/github-actions-stackoverflowerror/53720
**Category:** General Usage
**Tags:** question, testing, github, github-actions
**Created:** [January 21, 2021, 12:41pm UTC](https://discourse.julialang.org/t/github-actions-stackoverflowerror/53720 "2021-01-21T12:41:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@arzwa](https://discourse.julialang.org/u/arzwa)
#### Post date: [January 21, 2021, 12:41pm UTC](https://discourse.julialang.org/t/github-actions-stackoverflowerror/53720/1 "2021-01-21T12:41:30Z")
I’m trying to set up a GitHub actions workflow for testing a package. While my documentation builds fine, my tests error in a way I don’t understand. I get a `StackOverflowError` I cannot reproduce, and which does not make sense to me, especially since the documentation build workflow (which uses a.o. the method for which I get this `StackOverflowError` in the testing stage) works just fine.
The gh-actions run for a recent commit is here: [sampling ancestral states for profile · arzwa/DeadBird.jl@73a20bd · GitHub](https://github.com/arzwa/DeadBird.jl/runs/1730681166?check_suite_focus=true%5B%5D(https://github.com/arzwa/DeadBird.jl/runs/1730681166?check_suite_focus=true))
Would anybody have some hints or ideas about what could be going wrong here?
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### Author:  [@giordano](https://discourse.julialang.org/u/giordano)
#### Post date: [January 21, 2021, 1:32pm UTC](https://discourse.julialang.org/t/github-actions-stackoverflowerror/53720/2 "2021-01-21T13:32:05Z")
> [@Non-deterministic segfault (only triggered on GitHub Actions). Tips for debugging?](https://discourse.julialang.org/t/non-deterministic-segfault-only-triggered-on-github-actions-tips-for-debugging/53367/2):
>
> Tip to debug something on GitHub Actions: [GitHub - mxschmitt/action-tmate: Debug your GitHub Actions via SSH by using tmate to get access to the runner system itself.](https://github.com/mxschmitt/action-tmate)
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### Author:  [@arzwa](https://discourse.julialang.org/u/arzwa)
#### Post date: [January 21, 2021, 2:07pm UTC](https://discourse.julialang.org/t/github-actions-stackoverflowerror/53720/3 "2021-01-21T14:07:04Z")
Thanks a lot, I gave it a first shot, and in the tmate session my tests run fine (executed in the same way as I understand the julia-runtest action executes them). I’ll try digging a bit further…