I've found two problems. One is a problem in linuxcnc, which we should be able to fix in our stable and development branches. It is the problem you hit first.
A patch for the linuxcnc issue I discovered is at https://emergent.unpythonic.net/files/sandbox/0001-interp-don-t-return-potentially-stacked-data.patch and inlined below as well. However, the other will still affect you because it is in the version of boost packaged for fedora 23. You would have to apply the fix to the boost package and rebuild it: https://github.com/boostorg/python/commit/fe24ab9dd5440562e27422cd38f7de03356bfd16#commitcomment-11804515 The consequence of this bug is *** Error in `rs274': double free or corruption (!prev): 0x0000000001749450 *** with one stack frame pointing at _ZN5boost6python9exec_fileENS0_3strENS0_3api6objectES3_ (boost::python::exec_file) and linuxcnc (or rs274 in this case) exits immediately. -- 8< -- The old formulation was always wrong, because it constructed a temporary string and returned the value returned by its .c_str() method. Historically in libstdc++, this second string had the same .c_str() as the other one. However, in the version of libstdc++ on Fedora 23 (libstdc++-5.1.1-4.fc23.x86_64) this is not the case. This led to messages such as cant resolve path to '??????' as well as valgrind diagnostics and possibly to the diagnostic "'utf8' codec can't decode byte". Signed-off-by: Jeff Epler <[email protected]> --- src/emc/rs274ngc/rs274ngc_pre.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/emc/rs274ngc/rs274ngc_pre.cc b/src/emc/rs274ngc/rs274ngc_pre.cc index 388c382..332471f 100644 --- a/src/emc/rs274ngc/rs274ngc_pre.cc +++ b/src/emc/rs274ngc/rs274ngc_pre.cc @@ -2509,7 +2509,7 @@ const char *strstore(const char *s) if (s == NULL) throw invalid_argument("strstore(): NULL argument"); pair< set<string>::iterator, bool > pair = stringtable.insert(s); - return string(*pair.first).c_str(); + return pair.first->c_str(); } context_struct::context_struct() -- 2.5.0 ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
