Just had the problem – which of the last 40+ commits broke a certain feature in Piccolo2D rev550. As I used git as a svn proxy before, I remembered having heard of it’s binary-search delta-debugging feature.
So I started my first git bisect session:
go back fairly far (git checkout 9377e6a0c6e9bcdff1803f18918e8a1a9282a4ee, Eclipse Refresh, try, fine!),
start bisecting …