id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
7744,make_u32regex() performs insufficient UTF-8 validation,anonymous,John Maddock,"The program below shows a segfault for regular expression "".*\xf6.*"". AFAIK the maximum value allowed as leading byte for 4-byte sequences is 0xF4. I would expect an exception.

Regular expression "".*\xe4.*"" is created without exception. However 0xE4 starts a 3-byte character and no trailing bytes are present. I would expect an exception here too.

We use Boost 1.52.0 together with ICU 50.1. The behavior is the same in Linux and Windows.

{{{
#include <boost/regex/icu.hpp>

int main(void)
{
    // this line does not throw an exception although this is not valid UTF-8
    boost::u32regex(boost::make_u32regex("".*\xe4.*""));
    // this line segfaults
    boost::u32regex(boost::make_u32regex("".*\xf6.*""));
    return 0;
}
}}}",Bugs,closed,To Be Determined,regex,Boost 1.52.0,Problem,fixed,,