00f060000f
or "+" (these are invalid, because there is no preceding operand). When bsdgrep attempts to emulate GNU grep in discarding and ignoring the invalid ? or + operators, some later logic in tre_compile_fast() goes beyond the end of the buffer, leading to a crash. Fix this by bailing out, and reporting a bad pattern instead. Reported by: Steve Kargl MFC after: 1 week