# Bug hunt episode 2: a strange file appears

**URL:** <https://brian.discourse.group/t/bug-hunt-episode-2-a-strange-file-appears/481>\
**Category:** Announcements\
**Tags:** blog, bug-hunt\
**Created:** [24 September 2021 14:10 UTC](https://brian.discourse.group/t/bug-hunt-episode-2-a-strange-file-appears/481 "2021-09-24T14:10:41Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![mstimberg](https://yyz2.discourse-cdn.com/free1/user_avatar/brian.discourse.group/mstimberg/32/11_2.png) [@mstimberg](https://brian.discourse.group/u/mstimberg)\
**Post date:** [24 September 2021 14:10 UTC](https://brian.discourse.group/t/bug-hunt-episode-2-a-strange-file-appears/481/1 "2021-09-24T14:10:41Z")

</div>

This is the second blog post in our “bug hunt” series, the behind-the-scenes view of Brian debugging 🙂

> **[Bug hunt episode 2: a strange file appears](https://briansimulator.org/posts/2021/bug-hunt-episode-2-a-strange-file-appears/)**
>
> This is the second article in the “bug hunt” series. In these articles, I go through a recent bug in Brian (or one of its dependencies) and describe all the steps I used to find the source of the bug

The bug I debugged (and fixed 😉 ) is the appearance of a strange `-.o` file that users on Linux and OS X might have encountered when running recent versions of Brian. Enjoy 🎉