KERN_PROTECTION_FAILURE at 0x0000000000000004

Question

help how do i fix this please

Answer 1

A Google search led me to this discussion. I am encountering a similar problem under similar circumstances: I have C++ code that originated on Windows that I am trying to make run on the Mac. I am getting intermittent crashes in __numeric_load_locale, apparently when two separate threads try invoking std::ostream::operator <<(double) at the same time. (The call stacks above indicate that the original poster is also outputting a double value to a standard stream. In my case the stream in question is a std::wstringstream and we are trying to convert the double to a wide string.)
I believe, based largely on circumstantial evidence, that the crash is due to a bug in the GNU C++ library (libstdc++). I experimentally updated a version of my project to use the LLVM C++ library (libc++) and could not reproduce the crash. Unfortunately, my project is still targeting Snow Leopard, on which libc++ is not supported, so we are stuck with libstdc++ for the time being.  As a workaround, I'm going to try protecting our string conversion function with a critical section (it's part of a custom logging package built on an open source JSON library) to avoid the problem.