# \#=ERROR showing exception stack=# - What to do?

**URL:** https://discourse.julialang.org/t/error-showing-exception-stack-what-to-do/95805
**Category:** General Usage
**Created:** [March 9, 2023, 3:39pm UTC](https://discourse.julialang.org/t/error-showing-exception-stack-what-to-do/95805 "2023-03-09T15:39:47Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![xtalax](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xtalax/32/35293_2.png) [@xtalax](https://discourse.julialang.org/u/xtalax)
#### Post date: [March 9, 2023, 3:39pm UTC](https://discourse.julialang.org/t/error-showing-exception-stack-what-to-do/95805/1 "2023-03-09T15:39:47Z")

</div>

Hi all,

I’m working on a feature and I’ve gotten to a stage where almost anything I do is giving me the following error:

```julia
ODAEProblem Test: Error During Test at /home/alex/.julia/packages/SafeTestsets/A83XK/src/SafeTestsets.jl:25
  Got exception outside of a @test
  #=ERROR showing exception stack=# of type UndefVarError
Test Summary: | Error Total Time
ODAEProblem Test | 1 1 2m04.5s
ERROR: LoadError: Some tests did not pass: 0 passed, 0 failed, 1 errored, 0 broken.
in expression starting at /home/alex/.julia/dev/ModelingToolkit.jl/test/runtests.jl:3
ERROR: Package ModelingToolkit errored during testing

```

I don’t know what’s going on here, and there’s not much to go on. I’ve resorted to leaving `println` breadcrumbs throughout the expected callstack which is helping a bit, but what I really want to do is find the root cause of this problem - but I have no idea how I would go about producing an MWE for this.

This looks like a bug in Julia itself, which is concerning to me.

How can I diagnose what’s going on?