Aonghus Lawlor wrote:
Thanks for the suggestion- I tried this line:
const std::locale locale; const std::messages<char>& msgs = std::use_facet< std::messages<char> >( locale );
but it makes no difference- the program still crashes only with gcc-4.4, and not previous versions.
I don't follow: does the above code run OK, but regex still crashes?
This is the compile command I am using (on osx):
g++-mp-4.4 -g -o boost_test_regex boost_test_regex.C -I/opt/local/include/boost -L/opt/local/lib -lboost_regex-mt
and it terminates like this:
$ ./boost_test_regex terminate called after throwing an instance of 'std::bad_cast' what(): std::bad_cast Abort trap
The gcc-4.4 is from macports, and was working fine with the rest of my code, until I ran into this problem with boost:
$ g++-mp-4.4 -v Using built-in specs. Target: i386-apple-darwin9.5.0 Configured with: ../gcc-4.4-20081128/configure --prefix=/opt/local --enable-languages=c,c++,objc,obj-c++ --libdir=/opt/local/lib/gcc44 --includedir=/opt/local/include/gcc44 --infodir=/opt/local/share/info --mandir=/opt/local/share/man --with-local-prefix=/opt/local --with-system-zlib --disable-nls --program-suffix=-mp-4.4 --with-gxx-include-dir=/opt/local/include/gcc44/c++/ --with-gmp=/opt/local --with-mpfr=/opt/local Thread model: posix gcc version 4.4.0 20081128 (experimental) (GCC)
I'm not really familiar with the usage of locale's and use_facet's , so I'm grateful for any other suggestions you might have,
None at present, other than use a released version of gcc rather than the current 4.4 development branch. Probably your best bet is to report this as a bug to the gcc folks - if you need help in figuring out a test case let me know - but as I don't have access to that platform you'll have to do most of the work! Cheers, John.