I contributed a few days of work to an open source project. It was merged into a sub-branch, that was then squashed and merged by the library's original author to keep a clean git history, erasing my status as a contributor.

Now when I send people the library and tell them I'm a contributor, they don't believe me, because I've been reduced to a footnote in a commit message.

:(

Maybe when a squash and merge is done through the UI at least, the information about who contributed those changes could be tracked.