"build forked pull request" feature for BitBucket users.
The "build forked pull request" feature is available for GitHub users. This feature is not currently supported for BitBucket users. This is a feature request to have this feature available for BitBucket users too.
This idea has also been requested from the community here : https://discuss.circleci.com/t/bitbucket-pull-request-doesnt-trigger-build/10227/6