An issue was discovered in cpp-peglib through v0.1.12. peg::resolve_escape_sequence() in peglib.h has a heap-based buffer over-read.
https://github.com/yhirose/cpp-peglib/issues/122
https://github.com/yhirose/cpp-peglib/commit/b3b29ce8f3acf3a32733d930105a17d7b0ba347e