What Warnings Do Engineers Really Fix? The Compiler That Cried Wolf.

Build logs from a variety of Continuous Integration (CI) systems contain temporal data about the presence and distribution of compiler warnings. Results from the analysis and mining of that data will indicate what warnings engineers find useful and fix, or continuously ignore. The findings will include resolution times and resolution types for different warning categories. That data will help compiler developers adjust the warning levels according to the ground truth, clarify the diagnostic messages, and improve the non-actionable warnings. The empirical findings will also help engineers to decide what warnings are worth fixing and which ones are not.