message: Fix freeing of memory we don't own.
diff: @@ -144,7 +144,9 @@ std::string demangle( char* backtraceString, int frame )
  oss << "Frame " << frame << ": " << mangledName << std::endl;
  }
  +#if !defined(_LIBCPP_VERSION)
  free(realName);
  +#endif
  }
  // otherwise, print the whole line
  else
  