  [This paper has been withdrawn by the author due to updated research
available on arXiv (arXiv:1811.01918)] As the modern open-source paradigm makes
it easier to contribute to software projects, the number of developers involved
in these projects keep increasing. This growth in the amount of developers
makes it more difficult to deal with harmful contributions. Recent researches
have found that technical and social factors can predict the success of
contributions to open-source projects on GitHub. However, these researches do
not study the relation between these factors with the introduction of bugs. Our
study aims at investigating the influence of technical (such as, developers'
experience) and social (such as, number of followers) factors on the
introduction of bugs, using information from 14 projects hosted on GitHub.
Understanding the influence of these factors may be useful to developers, code
reviewers and researchers. For instance, code reviewers may want to double
check commits from developers that present bug-related factors. We found that
technical factors have a consistent influence in the introduction of bugs. On
the other hand, social factors present signs of influence in bug introduction
that would require more data to be properly evaluated. Moreover, we found that
perils present in the mining of GitHub may impact the factors results.
