To report a bug, use the issue tracker and follow this template:
[bug] Describe in few words what the problem is. It should be a one particular sentence.
## Bug:
Paste the code sample which does not work as it should.
## Expected output:
Describe what the output should be.
## Actual output:
Describe or show invalid output.
## Why do I think it is problematic? Why should the output be different from it is?
Describe your point of view (optional if more detailed description is needed)