id summary reporter owner description type status milestone component version severity resolution keywords cc 8890 "issue of escape sequnce ""\K""" mhosseini@… John Maddock "The escape sequence ""\K"" does not work in regex (boost v1.54). Is there any other option instead of it? (lookbehind has a limitation of fixed length pattern)" Bugs closed To Be Determined regex Boost 1.54.0 Problem worksforme regex escape sequence