---
name: Bug report
-about: Create a report to help us improve
+about: Create a report to help us improve Black's quality
title: ""
-labels: bug
+labels: "T: bug"
assignees: ""
---
-**Describe the bug** A clear and concise description of what the bug is.
+<!--
+Please make sure that the bug is not already fixed either in newer versions or the
+current development version. To confirm this, you have three options:
-**To Reproduce** Steps to reproduce the behavior:
-
-1. Take this file '...'
-1. Run _Black_ on it with these arguments '....'
-1. See error
-
-**Expected behavior** A clear and concise description of what you expected to happen.
-
-**Environment (please complete the following information):**
-
-- Version: \[e.g. main\]
-- OS and Python version: \[e.g. Linux/Python 3.7.4rc1\]
-
-**Does this bug also happen on main?** To answer this, you have two options:
-
-1. Use the online formatter at <https://black.vercel.app/?version=main>, which will use
+1. Update Black's version if a newer release exists: `pip install -U black`
+2. Use the online formatter at <https://black.vercel.app/?version=main>, which will use
the latest main branch.
-1. Or run _Black_ on your machine:
+3. Or run _Black_ on your machine:
- create a new virtualenv (make sure it's the same Python version);
- clone this repository;
- run `pip install -e .[d,python2]`;
- run `pip install -r test_requirements.txt`
- - make sure it's sane by running `python -m unittest`; and
+ - make sure it's sane by running `python -m pytest`; and
- run `black` like you did last time.
+-->
+
+**Describe the bug**
+
+<!-- A clear and concise description of what the bug is. -->
+
+**To Reproduce**
+
+<!--
+Minimal steps to reproduce the behavior with source code and Black's configuration.
+-->
+
+For example, take this code:
+
+```python
+this = "code"
+```
+
+And run it with these arguments:
+
+```sh
+$ black file.py --target-version py39
+```
+
+The resulting error is:
+
+> cannot format file.py: INTERNAL ERROR: ...
+
+**Expected behavior**
+
+<!-- A clear and concise description of what you expected to happen. -->
+
+**Environment**
+
+<!-- Please complete the following information: -->
+
+- Black's version: <!-- e.g. [main] -->
+- OS and Python version: <!-- e.g. [Linux/Python 3.7.4rc1] -->
+
+**Additional context**
-**Additional context** Add any other context about the problem here.
+<!-- Add any other context about the problem here. -->