@conference {1308, title = {Social interactions around cross-system bug fixings}, booktitle = {Proceedings of the 8th working conference on Mining software repositories - MSR {\textquoteright}11}, year = {2011}, note = {"We rely on information stored in versioning database and mailing lists of both systems and develop methods to reconstruct and integrate different historical database"}, month = {05/2011}, pages = {143-152}, publisher = {ACM Press}, organization = {ACM Press}, address = {New York, New York, USA}, abstract = {Cross-system bug fixing propagation is frequent among systems having similar characteristics, using a common framework, or, in general, systems with cloned source code fragments. While previous studies showed that clones tend to be properly maintained within a single system, very little is known about cross-system bug management. This paper describes an approach to mine explicitly documented cross-system bug fixings, and to relate their occurrences to social characteristics of contributors discussing through the project mailing lists--e.g., degree, betweenness, and brokerage--as well as to the contributors{\textquoteright} activity on source code. The paper reports results of an empirical study carried out on FreeBSD and OpenBSD kernels. The study shows that the phenomenon of cross-system bug fixing between these two projects occurs often, despite the limited overlap of contributors. The study also shows that cross-system bug fixings mainly involve contributors with the highest degree, betweenness and brokerage level, as well as contributors that change the source code more than others.}, keywords = {bug fixing, bug tracking system, committers, email, email archives, freebsd, mailing list, openbsd}, isbn = {9781450305747}, doi = {10.1145/1985441.1985463}, author = {Cerulo, Luigi and Cimitile, Marta and Di Penta, Massimiliano and Canfora, Gerardo} }