# Buggy code
def generate_result_code(self, code):
    func_type = self.function_type()
    if func_type.is_pyobject:
        arg_code = self.arg_tuple.py_result()
        code.globalstate.use_utility_code(
            UtilityCode.load_cached("PyObjectCall", "ObjectHandling.c")
        )
        code.putln(
            "%s = __Pyx_PyObject_Call(%s, %s, NULL); %s"
            % (
                self.result(),
                self.function.py_result(),
                arg_code,
                code.error_goto_if_null(self.result(), self.pos),
            )
        )
        self.generate_gotref(code)
    elif func_type.is_cfunction:
        if self.has_optional_args:
            actual_nargs = len(self.args)
            expected_nargs = len(func_type.args) - func_type.optional_arg_count
            self.opt_arg_struct = code.funcstate.allocate_temp(
                func_type.op_arg_struct.base_type, manage_ref=True
            )
            code.putln(
                "%s.%s = %s;"
                % (
                    self.opt_arg_struct,
                    Naming.pyrex_prefix + "n",
                    len(self.args) - expected_nargs,
                )
            )
            args = list(zip(func_type.args, self.args))
            for formal_arg, actual_arg in args[expected_nargs:actual_nargs]:
                code.putln(
                    "%s.%s = %s;"
                    % (
                        self.opt_arg_struct,
                        func_type.opt_arg_cname(formal_arg.name),
                        actual_arg.result_as(formal_arg.type),
                    )
                )
        exc_checks = []
        if self.type.is_pyobject and self.is_temp:
            exc_checks.append("!%s" % self.result())
        elif self.type.is_memoryviewslice:
            assert self.is_temp
            exc_checks.append(self.type.error_condition(self.result()))
        elif func_type.exception_check != "+":
            exc_val = func_type.exception_value
            exc_check = func_type.exception_check
            if exc_val is not None:
                exc_checks.append(
                    "%s == %s"
                    % (self.result(), func_type.return_type.cast_code(exc_val))
                )
            if exc_check:
                if self.nogil:
                    exc_checks.append("__Pyx_ErrOccurredWithGIL()")
                else:
                    exc_checks.append("PyErr_Occurred()")
        if self.is_temp or exc_checks:
            rhs = self.c_call_code()
            if self.result():
                lhs = "%s = " % self.result()
                if self.is_temp and self.type.is_pyobject:
                    # return_type = self.type # func_type.return_type
                    # print "SimpleCallNode.generate_result_code: casting", rhs, \
                    #    "from", return_type, "to pyobject" ###
                    rhs = typecast(py_object_type, self.type, rhs)
            else:
                lhs = ""
            if func_type.exception_check == "+":
                translate_cpp_exception(
                    code,
                    self.pos,
                    "%s%s;" % (lhs, rhs),
                    self.result() if self.type.is_pyobject else None,
                    func_type.exception_value,
                    self.nogil,
                )
            else:
                if (
                    self.overflowcheck
                    and self.type.is_int
                    and self.type.signed
                    and self.function.result() in ("abs", "labs", "__Pyx_abs_longlong")
                ):
                    goto_error = (
                        'if (unlikely(%s < 0)) { PyErr_SetString(PyExc_OverflowError, "value too large"); %s; }'
                        % (self.result(), code.error_goto(self.pos))
                    )
                elif exc_checks:
                    goto_error = code.error_goto_if(" && ".join(exc_checks), self.pos)
                else:
                    goto_error = ""
                code.putln("%s%s; %s" % (lhs, rhs, goto_error))
            if self.type.is_pyobject and self.result():
                self.generate_gotref(code)
        if self.has_optional_args:
            code.funcstate.release_temp(self.opt_arg_struct)


# Traceback (AssertionError)
======================================================================
FAIL: int_abs (builtin_abs)
Doctest: builtin_abs.int_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.int_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in int_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.int_abs
Failed example:
int_abs(-max_int-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-2147483648


======================================================================
FAIL: long_abs (builtin_abs)
Doctest: builtin_abs.long_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.long_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in long_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.long_abs
Failed example:
long_abs(-max_long-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-9223372036854775808


======================================================================
FAIL: long_long_abs (builtin_abs)
Doctest: builtin_abs.long_long_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.long_long_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in long_long_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/c/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.long_long_abs
Failed example:
long_long_abs(-max_long_long-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-9223372036854775808


======================================================================
FAIL: int_abs (builtin_abs)
Doctest: builtin_abs.int_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.int_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in int_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.int_abs
Failed example:
int_abs(-max_int-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-2147483648


======================================================================
FAIL: long_abs (builtin_abs)
Doctest: builtin_abs.long_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.long_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in long_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.long_abs
Failed example:
long_abs(-max_long-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-9223372036854775808


======================================================================
FAIL: long_long_abs (builtin_abs)
Doctest: builtin_abs.long_long_abs
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib64/python3.6/doctest.py", line 2199, in runTest
raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for builtin_abs.long_long_abs
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line unknown line number, in long_long_abs

----------------------------------------------------------------------
File "/home/abuild/rpmbuild/BUILD/Cython-0.27.1/TEST_TMP/run/cpp/builtin_abs/builtin_abs.cpython-36m-x86_64-linux-gnu.so", line ?, in builtin_abs.long_long_abs
Failed example:
long_long_abs(-max_long_long-1)     #doctest: +ELLIPSIS
Expected:
Traceback (most recent call last):
...
OverflowError: ...
Got:
-9223372036854775808

# Fixed code
def generate_result_code(self, code):
    func_type = self.function_type()
    if func_type.is_pyobject:
        arg_code = self.arg_tuple.py_result()
        code.globalstate.use_utility_code(
            UtilityCode.load_cached("PyObjectCall", "ObjectHandling.c")
        )
        code.putln(
            "%s = __Pyx_PyObject_Call(%s, %s, NULL); %s"
            % (
                self.result(),
                self.function.py_result(),
                arg_code,
                code.error_goto_if_null(self.result(), self.pos),
            )
        )
        self.generate_gotref(code)
    elif func_type.is_cfunction:
        if self.has_optional_args:
            actual_nargs = len(self.args)
            expected_nargs = len(func_type.args) - func_type.optional_arg_count
            self.opt_arg_struct = code.funcstate.allocate_temp(
                func_type.op_arg_struct.base_type, manage_ref=True
            )
            code.putln(
                "%s.%s = %s;"
                % (
                    self.opt_arg_struct,
                    Naming.pyrex_prefix + "n",
                    len(self.args) - expected_nargs,
                )
            )
            args = list(zip(func_type.args, self.args))
            for formal_arg, actual_arg in args[expected_nargs:actual_nargs]:
                code.putln(
                    "%s.%s = %s;"
                    % (
                        self.opt_arg_struct,
                        func_type.opt_arg_cname(formal_arg.name),
                        actual_arg.result_as(formal_arg.type),
                    )
                )
        exc_checks = []
        if self.type.is_pyobject and self.is_temp:
            exc_checks.append("!%s" % self.result())
        elif self.type.is_memoryviewslice:
            assert self.is_temp
            exc_checks.append(self.type.error_condition(self.result()))
        elif func_type.exception_check != "+":
            exc_val = func_type.exception_value
            exc_check = func_type.exception_check
            if exc_val is not None:
                exc_checks.append(
                    "%s == %s"
                    % (self.result(), func_type.return_type.cast_code(exc_val))
                )
            if exc_check:
                if self.nogil:
                    exc_checks.append("__Pyx_ErrOccurredWithGIL()")
                else:
                    exc_checks.append("PyErr_Occurred()")
        if self.is_temp or exc_checks:
            rhs = self.c_call_code()
            if self.result():
                lhs = "%s = " % self.result()
                if self.is_temp and self.type.is_pyobject:
                    # return_type = self.type # func_type.return_type
                    # print "SimpleCallNode.generate_result_code: casting", rhs, \
                    #    "from", return_type, "to pyobject" ###
                    rhs = typecast(py_object_type, self.type, rhs)
            else:
                lhs = ""
            if func_type.exception_check == "+":
                translate_cpp_exception(
                    code,
                    self.pos,
                    "%s%s;" % (lhs, rhs),
                    self.result() if self.type.is_pyobject else None,
                    func_type.exception_value,
                    self.nogil,
                )
            else:
                if exc_checks:
                    goto_error = code.error_goto_if(" && ".join(exc_checks), self.pos)
                else:
                    goto_error = ""
                code.putln("%s%s; %s" % (lhs, rhs, goto_error))
            if self.type.is_pyobject and self.result():
                self.generate_gotref(code)
        if self.has_optional_args:
            code.funcstate.release_temp(self.opt_arg_struct)