Git “error: The branch 'x' is not fully merged”

Question

Here are the commands I used from the master branch

git branch experiment
git checkout experiment

Then I made some changes to my files, commi

Answer 1

I did not have the upstream branch on my local git. I had created a local branch from master, git checkout -b mybranch . I created a branch with bitbucket GUI on the upstream git and pushed my local branch (mybranch) to that upstream branch. Once I did a git fetch on my local git to retrieve the upstream branch, I could do a git branch -d mybranch.