  In software development, version control systems (VCS) provide branching and
merging support tools. Such tools are popular among developers to concurrently
change a code-base in separate lines and reconcile their changes automatically
afterwards. However, two changes that are correct independently can introduce
bugs when merged together. We call semantic merge conflicts this kind of bugs.
Change impact analysis (CIA) aims at estimating the effects of a change in a
codebase. In this paper, we propose to detect semantic merge conflicts using
CIA. On a merge, DELTAIMPACTFINDER analyzes and compares the impact of a change
in its origin and destination branches. We call the difference between these
two impacts the delta-impact. If the delta-impact is empty, then there is no
indicator of a semantic merge conflict and the merge can continue
automatically. Otherwise, the delta-impact contains what are the sources of
possible conflicts.
