Re: [Boost-users] [regex] boost::match_extra vc 8.0 express accessviolation

From: John Maddock (john_at_[hidden])
Date: 2006-07-27 07:19:14

Ovanes Markarian wrote:
> Hi!
>
> I am trying to match a function body and find out if the params or
> return type have specific class name patterns. Therefore I did a
> really huge regex... sorry if is not so readable, but I used defines
> to make as little errors as possible...

> This is the boost::regex function where it crashes:
>
> template <class BidiIterator, class Allocator, class traits>
> bool perl_matcher<BidiIterator, Allocator, traits>::match_imp()
> {
>   // initialise our stack if we are non-recursive:
> #ifdef BOOST_REGEX_NON_RECURSIVE
>   save_state_init init(&m_stack_base, &m_backup_state);
>   used_block_count = BOOST_REGEX_MAX_BLOCKS;
> #if !defined(BOOST_NO_EXCEPTIONS)
>   try{
> #endif
> #endif
>
>   // reset our state machine:
>   position = base;
>   search_base = base;
>   state_count = 0;
>   m_match_flags |= regex_constants::match_all;
>
>   //LINE 162 perl_matcher_common.hpp
>   !!! m_presult->set_size((m_match_flags & match_nosubs) ? 1 :
> re.mark_count(), search_base, last);

> Call from this line causes access violation:
> Unhandled exception at 0x104817fd in some_app.exe: 0xC0000005: Access
> violation writing location 0x56394ab7.
>
> I re-built regex with BOOST_REGEX_MATCH_EXTRA uncommented in user.hpp.
>
>
> Would be really nice to receive some comments or suggestions.

I don't see anything obvious, if you put this together as a standalone cpp 
file that I can build/reproduce the error with then I'll look into it.

John.