https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102471
--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> --- There's also https://www.nist.gov/itl/ssd/software-quality-group/other-assurance-tool-test-collections Currently the only non-Java collection on the list is: https://sir.csc.ncsu.edu/portal/index.php However that repository has: https://sir.csc.ncsu.edu/portal/sir-license.php which seems to be a non-Open Source licence ("solely for non-commercial, educational, evaluation and/or personal use").