id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
3189	Python integer/long conversion to C++ unsigned int/long is broken	anderson.lizardo@…	Dave Abrahams	"The following snippet in libs/python/src/converter/builtin_converters.cpp:

{{{
          return numeric_cast<T>(
              PyLong_Check(intermediate)
              ? PyLong_AsUnsignedLong(intermediate)
              : PyInt_AS_LONG(intermediate));

}}}

does not check if an exception was thrown by the Python/C conversion functions. Therefore, in case of error, these functions are returning -1, which is being cast to unsigned int.

Another missing check is when the Python integer value to be converted is negative. In this case, a proper exception (such as ValueError) must be thrown."	Patches	closed	Boost 1.40.0	python USE GITHUB	Boost Development Trunk	Problem	fixed