This paper presents BugOss, a benchmark of real-world regression bugs found in OSS-Fuzz for experimenting with regression fuzzing techniques. To reproduce the real project context where the bugs were introduced, each study artifact of BugOss indicates the exact bug-inducing commit, and provides the information about the target bug, together with the existing bugs in the same commit. The experiment results with five fuzzing techniques show that the 18 C/C++ artifacts currently registered for BugOss encompass various cases of regression bugs in real-world. We believe that BugOss offers a useful basis for empirically investigating regression fuzzing techniques.

This work presents DOTELINK, a technique that infers fine-grained traceability links between Javadoc comments and JUnit test code. To resolve the limitation of method-level traceability links, DOTELINK establishes links in sentence-level for Javadoc comments and code region-level for JUnit test methods. DOTELINK first segregates each Javadoc comment into multiple sentences, and each JUnit test method into coherent code snippets. And then, DOTELINK associates a Javadoc sentence with a code snippet if their lexical similarity is high. DOTELINK identifies 62.4% of the true fine-grained traceability links in the experiments with 5 real-world projects. We believe that DOTELINK effectively helps developers utilize the duality of the two sorts of requirement representations to improve test quality.