Re: [boost] [xpressive] HP-UX_ia64_aCC problem ... care to help?

From: Eric Niebler (eric_at_[hidden])
Date: 2007-10-16 19:49:34

Boris Gubenko wrote:
>   test_actions crashes when std::string is trying to dereference _C_data
>   member which happens to be zero. It happens inside regex_match().
>   Attached slightly reduced reproducer.
> 
>   test_symbols.cpp has a similar call to regex_match() and I'm sure it
>   crashes for the same reason.
> 
>   Just rearranging the code in RW library <string> header makes the
>   crash disappear which may be indicative of a code generation problem.
>   And everything is fine when compiling with g++ 4.2.1.
> 
>   I suggest, unless you have a reason to believe that it may be some
>   code in xpressive that is causing the problem, we treat these test
>   failures as aC++ code generation problem at this point. We'll
>   investigate it and report back.
> 
> #include <boost/xpressive/xpressive_static.hpp>
> #include <boost/xpressive/regex_actions.hpp>
> extern "C" int puts(const char*);
> 
> namespace xp = boost::xpressive;
> 
> int main()
> {
>     using namespace boost::xpressive;
> 
>     std::string result;
>     std::string str("foo bar");
>     sregex rx = (+_w)[ xp::ref(result) += _ ] >> *(' ' >> (+_w)[ xp::ref(result) 
> += ',' + _ ]);
>     puts("calling regex_match");
>     regex_match(str, rx);
>     puts("exiting");
> }
> 

Hi, Boris. Is there any news about this issue? Can you suggest a 
work-around or should I mark these failures expected?

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com