[cl-ppcre-devel] Question about a strange behavior of cl-ppcre

Hello, I post this question because the description of this mailing list says that this is the place to post a question about cl-ppcre. I am a user of cl-ppcre on sbcl. I just re-installed cl-ppcre on sbcl, so I guess the version of cl-ppcre is the newest one. I found a strange behavior as below. CL-USER> (format t "~A" (cl-ppcre:regex-replace "a" "a" "\\")) \ CL-USER> (format t "~A" (cl-ppcre:regex-replace "a" "a" "\\\\")) \ CL-USER> (format t "~A" (cl-ppcre:regex-replace "a" "a" "\\\\\\\\")) \\ For me, it is very difficult to figure out what's going on. Would someone kindly help me understand this problem? Han-Soo