jit/backend/x86/test/test_fficall.py::TestFfiCall::()::test_handle_unsignedchar

self = <rpython.jit.backend.x86.test.test_fficall.TestFfiCall object at 0x7f297d39bb10>

    def test_handle_unsignedchar(self):
        self._run([types.uint8], types.uint8,
                  [rffi.cast(rffi.UCHAR, 191)],
>                 rffi.cast(rffi.UCHAR, 180))

jit/metainterp/test/test_fficall.py:240: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
jit/metainterp/test/test_fficall.py:142: in _run
    with FakeFFI(fake_call_impl_any):
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <rpython.jit.metainterp.test.test_fficall.FakeFFI object at 0x7f297d2f9510>
args = ()

    def __enter__(self, *args):
>       self.monkey.setattr(jit_libffi, 'jit_ffi_call_impl_any', self.fake_call_impl_any)
E       AttributeError: 'generator' object has no attribute 'setattr'

jit/metainterp/test/test_fficall.py:40: AttributeError

builder: rpython-linux-x86-64 build #887

test: jit/backend/x86/test/test_fficall/py/TestFfiCall/()/test_handle_unsignedchar