Hello *, I currently ran into the issue with xpressive. One of our test suites limits the stack usage to 32K and we have a stack overflow with over 600 function calls within xpressive. I stripped down our test case to the minimally reproducible source: #include <boost/xpressive/xpressive.hpp> #include <iostream> #include <string> using namespace boost::xpressive; namespace x=boost::xpressive; using namespace std; const sregex allowed_chars = x::set[alnum | (x::set= '_','-','+','.')]; sregex regex(string const& delim) { return bos // begin of sequence followed by

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!(s1=as_xpr(delim)) // zero or one delimiter (greedy) (s2=*(allowed_chars|as_xpr(delim)))// any number of allowed characters mixed with delim string ; }

int main() { const string s = "Process.DiagBuffer"; string delim; cout << "enter delim: "; cin >> delim; smatch what; bool matched = regex_match(s, what, regex(delim)); const string suffix=what[s2]; cout << suffix << endl; return 0; } Compilation Platform is Linux 32 bit. Compiler call: g++ -g -I"../software/boost_1_47_0" -o test main.cpp For that source the stack has to be limited to 24K. You can set the stack size and core dump file size like this: $ ulimit -c 10000 -s 24 Consider using ulimit in the sub-shell, since stack size can't be increased anymore. If you are interested I can post the compiled executable and the core dump file. When using optimization this works fine (it crashes with stack size being less equal 12K), but the main question is: Is it really normal to have more than 600 function calls in Debug mode? Many thanks, Ovanes