[cl-ppcre-devel] Weird :START Behaviour in CL-PPCRE:SCAN

Hi, In a part of the program, I find out that the below CL-PPCRE:SCAN call really slows down the whole operation: (cl-ppcre:scan "^\\[([^ ]{1,})+[ ]*(.{1,})?\\]" "foo [[Main]] [http://baz]''bold'''''''bar''''" :start 13) When I remove the :START keyword and the beginning `^' regex character, SCAN finishes the operation quite fast, as it should be. What can be the problem in here? (A bug?) How can I fix this weird behaviour? Regards.