raise OverflowError when converting negative value to unsigned long long

diff --git a/Cython/Compiler/PyrexTypes.py b/Cython/Compiler/PyrexTypes.py
index aa48d03a3253350051f591640931ebf8c370c1c9..145efec4c972e3b777dec85aff975192b8468930 100644 (file)
--- a/Cython/Compiler/PyrexTypes.py
+++ b/Cython/Compiler/PyrexTypes.py
@@ -1426,7 +1426,7 @@ static INLINE unsigned PY_LONG_LONG __pyx_PyInt_AsUnsignedLongLong(PyObject* x)
     if (PyInt_CheckExact(x)) {
         long val = PyInt_AS_LONG(x);
         if (unlikely(val < 0)) {
-            PyErr_SetString(PyExc_TypeError, "Negative assignment to unsigned type.");
+            PyErr_SetString(PyExc_OverflowError, "can't convert negative value to unsigned long long");
             return (unsigned PY_LONG_LONG)-1;
         }
         return val;