[regex] "EXC_BAD_ACCESS" when iterating over smatch captures
All: I'm trying to run the captures example included in the Boost.Regex documentation. When running the captures example verbatim, I get: "Program received signal: "EXC_BAD_ACCESS"." This is happening on Mac OS X 10.4.6 (Intel) with Boost 1.33.1. This problem seems to be related to the definition of BOOST_REGEX_MATCH_EXTRA - if I don't use captures and leave the macro undefined, other regex functions work fine.
From gdb:
(gdb) backtrace #0 0x00003ad4 in boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::string> >::str () #1 0x00003b3a in boost::operator<< <char, std::char_traits<char>, __gnu_cxx::__normal_iterator<char const*, std::string> > () #2 0x00001ff1 in print_captures () #3 0x000021e6 in main () The instruction that caused the error: 0x00003ad4 <+0068> movsbl (%eax),%eax I'm way out of my depth on this one. Does anyone have any thoughts on what to try? Has anyone been able to use captures on an Intel Mac system, or could this be a platform specific issue? Thanks, Chris
Christopher Hart wrote:
All:
I'm trying to run the captures example included in the Boost.Regex documentation. When running the captures example verbatim, I get: "Program received signal: "EXC_BAD_ACCESS"."
This is happening on Mac OS X 10.4.6 (Intel) with Boost 1.33.1. This problem seems to be related to the definition of BOOST_REGEX_MATCH_EXTRA - if I don't use captures and leave the macro undefined, other regex functions work fine.
In order to use the extended capture information then you must define BOOST_REGEX_MATCH_EXTRA: *both when building your application, and when building the regex lib* If you're linking against the standard bjam built lib's then this won't work: the lib's won't be binary compatible with the BOOST_REGEX_MATCH_EXTRA option. Yes I no this is a pain, but it's a feature that has costs, so I don't want to enable it by default. John.
When I received the error, BOOST_REGEX_MATCH_EXTRA was defined both at my program's compile time and when in user.hpp when I built boost. Based on my vauge understanding of that error, my impression was that it was attempting to read memory that had already been de-allocated. Is that consistent with a missing definition (either when the library was built or at my program's compile time)? Or am I missing something? Thanks, Chris On 5/23/06, John Maddock <john@johnmaddock.co.uk> wrote:
Christopher Hart wrote:
All:
I'm trying to run the captures example included in the Boost.Regex documentation. When running the captures example verbatim, I get: "Program received signal: "EXC_BAD_ACCESS"."
This is happening on Mac OS X 10.4.6 (Intel) with Boost 1.33.1. This problem seems to be related to the definition of BOOST_REGEX_MATCH_EXTRA - if I don't use captures and leave the macro undefined, other regex functions work fine.
In order to use the extended capture information then you must define BOOST_REGEX_MATCH_EXTRA:
*both when building your application, and when building the regex lib*
If you're linking against the standard bjam built lib's then this won't work: the lib's won't be binary compatible with the BOOST_REGEX_MATCH_EXTRA option. Yes I no this is a pain, but it's a feature that has costs, so I don't want to enable it by default.
John.
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Actually, I stand corrected. Just to be sure, I did a clean and re-built and it's working now. Mia culpa! Thanks for the information. Chris On 5/23/06, Christopher Hart <hartct@gmail.com> wrote:
When I received the error, BOOST_REGEX_MATCH_EXTRA was defined both at my program's compile time and when in user.hpp when I built boost. Based on my vauge understanding of that error, my impression was that it was attempting to read memory that had already been de-allocated. Is that consistent with a missing definition (either when the library was built or at my program's compile time)? Or am I missing something?
Thanks, Chris
On 5/23/06, John Maddock <john@johnmaddock.co.uk> wrote:
Christopher Hart wrote:
All:
I'm trying to run the captures example included in the Boost.Regex documentation. When running the captures example verbatim, I get: "Program received signal: "EXC_BAD_ACCESS"."
This is happening on Mac OS X 10.4.6 (Intel) with Boost 1.33.1. This problem seems to be related to the definition of BOOST_REGEX_MATCH_EXTRA - if I don't use captures and leave the macro undefined, other regex functions work fine.
In order to use the extended capture information then you must define BOOST_REGEX_MATCH_EXTRA:
*both when building your application, and when building the regex lib*
If you're linking against the standard bjam built lib's then this won't work: the lib's won't be binary compatible with the BOOST_REGEX_MATCH_EXTRA option. Yes I no this is a pain, but it's a feature that has costs, so I don't want to enable it by default.
John.
_______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
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