BUG when using /undo

[xavitg]

Issue

I use /undo and I get this error that closes my aider instance instantly:

image.png main.py platforms/facebook.py platforms/google_ads.py static/js/scripts.js templates/index.html

/undo

Traceback (most recent call last): File "/home/soporte/BI-Improved/venv/bin/aider", line 8, in sys.exit(main()) ^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/main.py", line 640, in main coder.run() File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/coders/base_coder.py", line 770, in run self.run_one(user_message, preproc) File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/coders/base_coder.py", line 805, in run_one message = self.preproc_user_input(user_message) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/coders/base_coder.py", line 794, in preproc_user_input return self.commands.run(inp) ^^^^^^^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/commands.py", line 204, in run return self.do_run(matching_commands[0][1:], rest_inp) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/commands.py", line 179, in do_run return cmd_method(args) ^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/aider/commands.py", line 426, in cmd_undo current_branch = self.coder.repo.repo.active_branch.name ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/git/repo/base.py", line 1036, in active_branch return self.head.reference ^^^^^^^^^^^^^^^^^^^ File "/home/soporte/BI-Improved/venv/lib/python3.11/site-packages/git/refs/symbolic.py", line 413, in _get_reference raise TypeError("%s is a detached symbolic reference as it points to %r" % (self, sha)) TypeError: HEAD is a detached symbolic reference as it points to 'b9815c231155df27ef1eee4bb01fdd7f6bbe5d3a' (venv) soporte@ai:~/BI-Improved$

This is a serious problem because I lose all the changes and now I have to start again from 0 instead of using undo command to revert the wrong changes made by Claude.

Version and model info

Aider 0.50.1 Antrophic vertex ai claude 3.5 sonnet

[tdobson]

You definitely haven't lost all the changes - they're all still in git. The changes are saved, and you'll be able to revert the steps with git. I can talk you through it probably if you'd like?

Paul: I think I've experienced this, and I'm not entirely sure why/what's going on - but I know that my repo is in a symbolic link? But also I note it could be releated to other things.

@xavitg : take a look here

Step 1 open a command line Step 2 type cd /home/soporte/BI-Improved/ Step 3

take a look here:

do git log

to check your git is working as expected

step 4 Revert the Last Commit (Discard the Changes most recently made - this won't work - if you've subsequently committed to the repository after stopping using aider)

git reset --hard HEAD~1

This command will move HEAD back by one commit and discard all the changes in that commit. (beware - if you've worked on this after using aider - it will change things AND you will lose your changes)

[paul-gauthier]

Thanks for trying aider and filing this issue.

It looks like you ran aider in a git repo with a detached head? Or you changed the working dir to a detached head while aider was running?

[paul-gauthier]

Thanks for trying aider and filing this issue.

The fix is available in the main branch. You can get it by installing the latest version from github:

aider --install-main-branch

# or...

python -m pip install --upgrade git+https://github.com/paul-gauthier/aider.git

If you have a chance to try it, let me know if it works better for you.