Encoding circuits are incorrect

[abdullahkhalids]

I received a bug report in an email that I am pasting here

Here is the issue I've encountered. I'm using stac to find logical states given a set of stabilizer generators and have noticed some discrepancies between the logical states found by stac and my own implementation. To test which was correct I checked if the output set of logical states was correctly stabilized and I saw that using stac many states are not stabilized.

I created a collab notebook https://colab.research.google.com/drive/1GcqFy1fkYJTw4tVKU8Vg4WcAHUZYcXGD?usp=sharing with a simple set of experiments for several codes.
Stac does work work some codes but fails for others. I thought you would like to know in case there may be a bug in your encoding circuit. Please let me know what you think and if you end up finding any bugs.

[manuelgpda]

When I run the collab notebook in https://colab.research.google.com/drive/1GcqFy1fkYJTw4tVKU8Vg4WcAHUZYcXGD?usp=sharing I do not obtain ´Passed´ in all the tests so I am not sure that #3 fixed #2 .

[abdullahkhalids]

You are correct. I mindlessly accepted the pull request. I will take a look at this soon, and figure out what's wrong.